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Rate of change of angle
In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time)
Angular_frequency
Number of occurrences or cycles per unit time
definitions of frequency are used in certain contexts, such as the angular frequency in rotational or cyclical properties, when the rate of angular progress
Frequency
Direction and rate of rotation
kinematics, angular velocity (symbol ω or ω → {\displaystyle {\vec {\omega }}} , the lowercase Greek letter omega), also known as the angular frequency vector
Angular_velocity
Number of rotations per unit time
(cps), and revolutions per minute (rpm). Rotational frequency can be obtained dividing angular frequency, ω, by a full turn (2π radians): ν=ω/(2π rad). It
Rotational_frequency
Movement of an object's magnetic moment axis about a magnetic field
the angular momentum. The angular momentum vector J → {\displaystyle {\vec {J}}} precesses about the external field axis with an angular frequency known
Larmor_precession
Frequency at which systems tend to oscillate
systems, it is convenient to use the angular frequency ω = 2πf rather than the frequency f, or the complex frequency domain parameter s = σ + ωi. In a mass–spring
Natural_frequency
Mathematical transform that expresses a function of time as a function of frequency
unit hertz. The transform variable can also be written in terms of angular frequency, ω = 2 π ξ {\displaystyle \omega =2\pi \xi } , with the unit radian
Fourier_transform
Spatial frequency of a wave
divided by time (in cycles per second or reciprocal seconds), and the angular frequency, defined as the phase angle divided by time (in radians per second)
Wavenumber
Particle effect
an electron around the median, with an angular frequency of 2mc2/ℏ, which is twice the Compton angular frequency. The oscillatory Zitterbewegung motion
Zitterbewegung
Energy–frequency relation in quantum mechanics
such as frequency ν, wavelength λ, wavenumber ν ~ {\displaystyle {\tilde {\nu }}} , and their angular equivalents (angular frequency ω, angular wavelength
Planck_relation
Physical characteristic of oscillating systems
\omega _{0}={\sqrt {k/m}}} is called the undamped angular frequency of the oscillator or the natural frequency, ζ = c 2 m k {\displaystyle \zeta ={\frac {c}{2{\sqrt
Resonance
Vector describing a wave; often its propagation direction
four-vector can be defined, combining the (angular) wave vector and (angular) frequency. The terms wave vector and angular wave vector have distinct meanings
Wave_vector
Physical constant in quantum mechanics
relates the energy of a photon to its angular frequency, and the linear momentum of a particle to the angular wavenumber of its associated matter wave
Planck_constant
Motion of charged particles
particle in cyclotron motion is characterized by an angular frequency referred to as the cyclotron frequency or gyrofrequency and a radius referred to as the
Cyclotron_motion
Wave shaped like the sine function
a wave number (or angular wave number) k {\displaystyle k} , which represents the proportionality between the angular frequency ω {\displaystyle \omega
Sine_wave
Units defined only by physical constants
{c}{t_{\text{P}}}}={\sqrt {\frac {c^{7}}{\hbar G}}}} 5.5608×1051 m/s2 frequency (T-1) f P = c 5 ℏ G {\displaystyle f_{\text{P}}={\sqrt {\frac {c^{5}}{\hbar
Planck_units
Free swinging suspended body
k=\sin(\theta _{0}/2),} and ω = 2 π / T {\displaystyle \omega =2\pi /T} the angular frequency. If one defines ε = 1 2 ⋅ 1 − cos ( θ 0 / 2 ) 1 + cos ( θ 0 /
Pendulum_(mechanics)
SI unit of angular velocity or angular frequency
is the unit of angular velocity in the International System of Units (SI). The radian per second is also the SI unit of angular frequency (symbol ω, omega)
Radian_per_second
Physical quantity
kinematics, angular acceleration (symbol α, alpha) is the time derivative of angular velocity. Following the two types of angular velocity, spin angular velocity
Angular_acceleration
Electrical engineering concept
This has applications in the field of computer vision. Instantaneous angular frequency is defined as: ω ( t ) = d φ ( t ) d t , {\displaystyle \omega (t)={\frac
Instantaneous phase and frequency
Instantaneous_phase_and_frequency
Frequency response boundary
cutoff frequency is given by ω c = 1 α . {\displaystyle \omega _{\mathrm {c} }={\frac {1}{\alpha }}.} Where s is the s-plane variable, ω is angular frequency
Cutoff_frequency
Relation of wavelength/wavenumber as a function of a wave's frequency
Dispersion relations are more commonly expressed in terms of the angular frequency ω = 2 π f {\displaystyle \omega =2\pi f} and wavenumber k = 2 π /
Dispersion_relation
To-and-fro periodic motion in science and engineering
{\displaystyle c_{2}} is the initial speed of the particle divided by the angular frequency, c 2 = v 0 ω {\displaystyle c_{2}={\frac {v_{0}}{\omega }}} . Thus
Simple_harmonic_motion
Frequency swept signal
instantaneous angular frequency, ω, is defined as the phase rate as given by the first derivative of phase, with the instantaneous ordinary frequency, f, being
Chirp
Physical system that responds to a restoring force proportional to displacement
(with a slightly different frequency than the undamped case) with the amplitude gradually decreasing to zero. The angular frequency of the underdamped harmonic
Harmonic_oscillator
Unit of rotational speed
proportional ISQ quantities: frequency and angular frequency, respectively. The conversions between a frequency f and an angular frequency ω are ω = 2 π f , f
Revolutions_per_minute
Signal processing effect
corresponds to the angular resolution of the image (and, for frequency, the speed of the viewer's lateral movement), which is the angular aliasing of the
Aliasing
Twisting of an object due to an applied torque
Electricity has a frequency of 50 Hz; this is the typical frequency in Europe. In North America, the frequency is 60 Hz. The angular frequency can be calculated
Torsion_(mechanics)
Equations describing nuclear magnetic resonance
direction with angular frequency ω0. If the observer were rotating around the same axis in clockwise direction with angular frequency Ω, Mxy it would
Bloch_equations
Branch of physics
refraction of the medium at angular frequency ω j {\displaystyle \omega _{j}} . Thus, the second-order polarization at angular frequency ω 3 = ω 1 + ω 2 {\displaystyle
Nonlinear_optics
SI derived unit of angle
in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics. It is defined such that one
Radian
Last letter of the Greek alphabet
dN/dS or Ka/Ks ratio) Physics: Angular velocity or angular frequency Rotation velocity (bold), rotational speed or frequency In computational fluid dynamics
Omega
Special mathematical functions defined on the surface of a sphere
Fourier series, the spherical harmonics may be organized by (spatial) angular frequency, as seen in the rows of functions in the illustration on the right
Spherical_harmonics
Indication of rate and sense of rotation
\sin(-t))} has a negative frequency of −1 radian per unit of time, which rotates clockwise instead. Let ω > 0 be an angular frequency with units of radians/second
Negative_frequency
Electrical resonant circuit
external source at an angular frequency ω0 at which the inductive and capacitive reactances are equal in magnitude. The frequency at which this equality
LC_circuit
Wave amplification in rotating objects
orbital angular momentum strikes a rotating body, the frequency of the wave as seen by the rotating body is shifted. For an incident wave with an angular frequency
Zeldovich_amplification
Primary frequency standard
conversion from angular frequency ( ω {\displaystyle \omega } ) to frequency ( f {\displaystyle f} ), or vice versa. Angular frequencies are conventionally
Caesium_standard
Effect of a material on light
derivative of the reciprocal of the group velocity with respect to angular frequency, which results in group-velocity dispersion = d2k/dω2. If a light
Dispersion_(optics)
Underwater sound detected in 1997 from a non-tectonic cryoseism (ice quake)
waveforms from a detected sound "can also be caused by so-called angular frequency dependent radiation patterns associated with antisymmetric mode motion
Bloop
Differential equation important in physics
analyze its frequency eigenmodes. A so-called eigenmode is a solution that oscillates in time with a well-defined constant angular frequency ω, so that
Wave_equation
Displacement measured angle-wise when a body is showing circular or rotational motion
infinitesimal rotations are applied is irrelevant. Angular distance Angular frequency Angular position Angular velocity Azimuth Rotation matrix § Infinitesimal
Angular_displacement
Electric current that periodically reverses direction
{\displaystyle \omega } is the angular frequency (unit: radians per second). The angular frequency is related to the physical frequency, f {\displaystyle f} (unit:
Alternating_current
Topics referred to by the same term
Cyclotron resonance may refer to: Cyclotron motion - the motion of charged particles in a magnetic field Ion cyclotron resonance - the motion of heavy
Cyclotron_resonance
Spectral density of light emitted by a black body
solid angle, per spectral unit (frequency, wavelength, wavenumber or their angular equivalents, or fractional frequency or wavelength). Since the radiance
Planck's_law
Frequency divided by a characteristic frequency
The normalized Nyquist frequency is N 2 {\displaystyle {\tfrac {N}{2}}} with the unit 1/Nth cycle/sample. Angular frequency, denoted by ω {\displaystyle
Normalized frequency (signal processing)
Normalized_frequency_(signal_processing)
Distance over which a wave's shape repeats
wavenumber k (2π times the reciprocal of wavelength) and angular frequency ω (2π times the frequency) as: y ( x , t ) = A cos ( k x − ω t ) = A cos
Wavelength
variable t (often time) to a function of a complex variable s (complex angular frequency). The Laplace transform of a function f ( t ) {\displaystyle f(t)}
List_of_Laplace_transforms
Elementary particle or quantum of light
equal numbers of the two possible angular momenta. The spin angular momentum of light does not depend on its frequency, and was experimentally verified
Photon
SI unit of frequency
average. Even though frequency, angular velocity, angular frequency and radioactivity all have the dimension T−1, of these only frequency is expressed using
Hertz
Amount of energy transferred or converted per unit time
and angular velocity ω, P ( t ) = τ ⋅ ω , {\displaystyle P(t)={\boldsymbol {\tau }}\cdot {\boldsymbol {\omega }},} where ω is angular frequency, measured
Power_(physics)
How quickly an object undergoes movement in a circular path
{\omega }}={d\beta \over dt}{\hat {u}}_{\beta }} is the angular velocity (angular frequency) vector normal to the plane of rotation of the body, where
Tangential_speed
Multi-lobed plane curve
(rather than Cartesian coordinate) graphs of sinusoids that have angular frequency of k and an amplitude of a that determine the radial coordinate r
Rose_(mathematics)
Quasiparticle of mechanical vibrations
phonon frequencies are sometimes given in spectroscopic wavenumber notation, where the symbol ω represents ordinary frequency (not angular frequency), and
Phonon
Measure of fluid stability against vertical displacement
z ′ {\displaystyle z'} has oscillating solutions (and N gives our angular frequency). If it is positive, then there is run away growth – i.e. the fluid
Brunt–Väisälä_frequency
Ocean and atmospheric oscillations
} Thus the Coriolis parameter, f {\displaystyle f} , is the angular velocity or frequency required to maintain a body at a fixed circle of latitude or
Coriolis_frequency
Unit of frequency
confused with radian per second (rad⋅s−1), the SI unit for angular frequency and angular velocity. As the radian is a dimensionless unit, radian per
Inverse_second
function. Angular frequency (or angular speed) is the magnitude of the vector quantity that is angular velocity. The term angular frequency vector ω →
Glossary_of_physics
Difference between phase angles
the boundary. Consider the component of the incident wave with an angular frequency of ω, which has the waveform u i n c ( x , t ) = A e i ( k 1 x − ω
Reflection_phase_change
Rose curve with angular frequency 2
(also known as four-leaved clover) is a type of rose curve with an angular frequency of 2. It has the polar equation: r = a cos ( 2 θ ) , {\displaystyle
Quadrifolium
Fourier analysis technique applied to sequences
{\displaystyle S(f)} , and from the angular frequency form of the DTFT. The latter is obtained by defining an angular frequency variable, ω ≜ 2 π f T {\displaystyle
Discrete-time Fourier transform
Discrete-time_Fourier_transform
Type of signal processing filter
{1}{\sqrt {1+{\omega }^{2n}}}},} where ω {\displaystyle \omega } is the angular frequency in radians per second and n {\displaystyle n} is the number of poles
Butterworth_filter
Passive two-terminal electrical component that stores energy in its magnetic field
the amplitude ( I P {\displaystyle I_{P}} ) of the current and the angular frequency ( ω {\displaystyle \omega } ) of the current. i ( t ) = I P
Inductor
Sinusoidal wave whose frequency is an integer multiple
fundamental angular frequency of the distorted (non-sinusoidal) periodic signal. The angular frequency is related to the cyclic frequency as ω = 2 π f
Harmonics_(electrical_power)
Method in physics
{D}}} ) is a parameter in the Debye model that refers to a cut-off angular frequency for waves of a harmonic chain of masses, used to describe the movement
Debye_model
Elastic waves propagating in solid plates or spheres
^{2}}{c_{t}^{2}}}.} Inherent in these equations is a relationship between the angular frequency ω and the wave number k. Numerical methods are used to find the phase
Lamb_waves
Dynamic disturbance in a medium or field
point of constant phase of the wave will travel for a discrete frequency. The angular frequency ω cannot be chosen independently from the wavenumber k, but
Wave
Quantum mechanical model
force constant, ω = k / m {\textstyle \omega ={\sqrt {k/m}}} is the angular frequency of the oscillator, x ^ {\displaystyle {\hat {x}}} is the position
Quantum_harmonic_oscillator
Quantum mechanical waves describing matter
}{d(1/\lambda )}}} (The modern definition of group velocity uses angular frequency ω and wave number k). By applying the differentials to the energy
Matter_wave
Greek letter
the minuscule script. It is a symbol for: Angular frequency of a wave in fluid dynamics (angular frequency is usually represented by ω {\displaystyle
Pi_(letter)
Graph of the frequency response of a control system
first line for angular frequencies below ω c {\displaystyle \omega _{\text{c}}} is a horizontal line at 0 dB, since at low frequencies the ω / ω c {\displaystyle
Bode_plot
Movement of an object which leaves at least one point unchanged
type of angular velocity (spin angular velocity and orbital angular velocity) and angular momentum (spin angular momentum and orbital angular momentum)
Rotation
Mechanical oscillations about an equilibrium point
{\displaystyle f_{n}={1 \over {2\pi }}{\sqrt {k \over m}}.\!} Note: angular frequency ω (ω=2 π f) with the units of radians per second is often used in
Vibration
Time constant of an RC circuit
time constant in seconds and cutoff frequency in hertz (Hz). The cutoff frequency when expressed as an angular frequency ( ω c = 2 π f c ) {\displaystyle
RC_time_constant
Characteristic values of a plasma
ln Λ {\displaystyle \ln \Lambda } ). electron gyrofrequency, the angular frequency of the circular motion of an electron in the plane perpendicular to
Plasma_parameters
Fluid dynamics theory on gravity waves
function, k is the angular wavenumber in radians per metre, related to the wavelength λ by k = 2π/λ, ω is the angular frequency in radians per second
Airy_wave_theory
Partial differential equation used in physics
where i is the imaginary unit, ω = 2π f is the angular frequency in radians per second, f is the frequency in hertz, and e i ω t = cos ( ω t ) + i sin
Electromagnetic_wave_equation
Complex number representing a particular sine wave
whose amplitude A and initial phase θ are time-invariant and whose angular frequency ω is fixed. It is related to a more general concept called analytic
Phasor
Opposition to current by inductance or capacitance
{\displaystyle X_{C}} is inversely proportional to the signal frequency f {\displaystyle f} (or angular frequency ω {\displaystyle \omega } ) and the capacitance
Electrical_reactance
Non-linear second order differential equation and its attractor
is without a driving force, and ω {\displaystyle \omega } is the angular frequency of the periodic driving force. The Duffing equation can be seen as
Duffing_equation
Resistor Inductor Capacitor Circuit
resonate at a specific frequency, the resonance frequency, f0. Frequencies are measured in units of hertz. In this article, angular frequency, ω0, is used because
RLC_circuit
Conserved physical quantity; rotational analogue of linear momentum
object, f {\displaystyle f} is the orbit's frequency and r {\displaystyle r} is the orbit's radius. The angular momentum L {\displaystyle L} of a uniform
Angular_momentum
Electronic oscillator circuit
complex frequency ( s = j ω {\displaystyle s=j\omega } ), ω s {\displaystyle \omega _{\mathrm {s} }} is the series resonant angular frequency, and ω p
Crystal_oscillator
Phenomenon resulting from the superposition of two waves
{\displaystyle \omega =2\pi f} is the angular frequency of the wave. Suppose a second wave of the same frequency and amplitude but with a different phase
Wave_interference
Dependence of group velocity on frequency
inverse of group velocity of light in a material with respect to angular frequency, GVD ( ω 0 ) ≡ ∂ ∂ ω ( 1 v g ( ω ) ) ω = ω 0 , {\displaystyle {\text{GVD}}(\omega
Group-velocity_dispersion
Rate at which the phase of the wave propagates in space
wave's angular frequency ω, which specifies angular change per unit of time, and wavenumber (or angular wave number) k, which represent the angular change
Phase_velocity
Square root of the mean square
t)\right]^{2}dt}},} where t is time and ω is the angular frequency (ω = 2π/T, where T is the period of the wave). Since Ip is a positive
Root_mean_square
Structure that guides waves efficiently
describe any infinitely long single-tone signal at frequency f {\displaystyle f} , (angular frequency ω = 2 π f {\displaystyle \omega =2\pi f} ), and rewrite
Waveguide
Mathematical curve outputted from a specific pair of parametric equations
two perpendicular oscillations in x and y directions of different angular frequency (a and b). The resulting family of curves was investigated by Nathaniel
Lissajous_curve
Symbols for constants, special functions
graphic variant, see pomega) represents: angular frequency of a wave, in fluid dynamics (angular frequency is usually represented by ω {\displaystyle
Greek letters used in mathematics, science, and engineering
Greek_letters_used_in_mathematics,_science,_and_engineering
Special type of cyclic particle accelerator
deuterons and 390 MeV α-particles. In a classical cyclotron, the angular frequency of the electric field is given by ω = q B m {\displaystyle \omega
Synchrocyclotron
Model of electrical conduction
plasma frequency, the dielectric function is negative and the field cannot penetrate the sample. Light with angular frequency below the plasma frequency will
Drude_model
Wave where gravity is the main restoring force
phase speed in terms of the angular frequency ω {\displaystyle \omega } and the wavenumber, the gravity wave angular frequency can be expressed as ω = g
Gravity_wave
Technique for measuring nuclear spin
on, the spin will precess around it with Larmor frequency ν0 and the corresponding angular frequency is ω0. According to mechanics, the equation of motion
Rabi_resonance_method
Electromagnetic measurement technique
{1}{i\omega C_{\text{dl}}}}} where ω {\displaystyle \omega } is the angular frequency of a sinusoidal signal (rad/s), and i 2 = − 1 {\displaystyle i^{2}=-1}
Dielectric_spectroscopy
Formula for sound intensity loss in a Newtonian fluid
the dynamic viscosity coefficient of the fluid, ω is the sound's angular frequency, ρ is the fluid density, and V is the speed of sound in the medium
Stokes's law of sound attenuation
Stokes's_law_of_sound_attenuation
Predecessor to modern quantum mechanics (1900–1925)
would be n–l–m in the Sommerfeld model. The frequency ω {\displaystyle \omega } is the angular frequency of the orbit 2 π / T n {\displaystyle 2\pi /T_{n}}
Old_quantum_theory
Theorem in mathematics
{\displaystyle x(t)} , and ω = 2 π f {\displaystyle \omega =2\pi f} is angular frequency in radians per second. The interpretation of this form of the theorem
Parseval's_theorem
Physical constants of energy and wavenumber
the Compton frequency of the electron, ω C = 2 π f C {\displaystyle \omega _{\text{C}}=2\pi f_{\text{C}}} is the Compton angular frequency of the electron
Rydberg_constant
Coupling in quantum physics
mechanics, angular momentum coupling is the procedure of constructing eigenstates of total angular momentum out of eigenstates of separate angular momenta
Angular_momentum_coupling
Device to demonstrate Earth's rotation
{\displaystyle \omega _{0}={\sqrt {\frac {g}{L}}}} is the natural angular frequency of the pendulum, φ {\displaystyle \varphi } is the latitude, g {\displaystyle
Foucault_pendulum
ANGULAR FREQUENCY
ANGULAR FREQUENCY
Girl/Female
Afghan, American, British, Christian, English, Finnish, French, Greek, Indian, Irish, Lebanese, Polish, Portuguese, Romanian, Spanish, Swedish, Tamil
Heavenly Messenger; Angel; Messenger from God
Girl/Female
Muslim
Unique, Singular
Boy/Male
Arabic, Hindu, Indian, Muslim
Shining
Girl/Female
Christian & English(British/American/Australian)
Angelic
Girl/Female
Arabic, Muslim
Unique; Singular
Female
English
Feminine form of Latin Angelus, ANGELA means "angel, messenger."
Girl/Female
Muslim
Unique, Singular, Exclusive
Boy/Male
Arabic, Muslim, Parsi, Pashtun
Embers
Girl/Female
Muslim
Unique, Singular, Exclusive
Boy/Male
Indian, Sanskrit
Praising; A Hymn
Girl/Female
Muslim
Unique, Singular, Exclusive
Boy/Male
Indian, Sanskrit
Radiant; Bright; Enlightening
Girl/Female
American, Australian, British, English
Beautiful Goddess
Girl/Female
French Spanish American Italian Latin Greek
Angel.
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Tamil, Telugu
Not Wild; Gentle
Girl/Female
Indian, Tamil
Lovely; Kind-hearted
Girl/Female
Indian
Unique, Singular
Boy/Male
Hindu, Indian, Tamil
Regular Winner
Boy/Male
Gujarati, Hindu, Indian, Kannada
Spark of Fire
Boy/Male
Hindu, Indian, Kannada, Tamil
Witty; Super
ANGULAR FREQUENCY
ANGULAR FREQUENCY
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu, Traditional
Doll
Boy/Male
English
derived from the flower name Lily. Symbol of innocence; purity; beauty.
Girl/Female
American, Australian, Greek, Hawaiian, Hebrew
Unique; The Beautiful Ocean; Peaceful; Forgiving; Precious Stone; Rare; Perfect; Hay Meadow; Hay Clearing; The Sea; Necklace; Place Name
Girl/Female
Tamil
Gift of Love
Female
English
Variant spelling of English Eloise, ELOUISE means "hale-wide; very healthy and sound."Â
Girl/Female
English
Feminine God will judge.
Girl/Female
Hindu, Indian, Marathi, Tamil
Attraction
Boy/Male
Australian, Danish, French, German, Swedish, Swiss
Leader of the People; People's Ruler; King of Nations
Girl/Female
Latin Greek
Mother of Hercules.
Boy/Male
Sikh
Warrior of God
ANGULAR FREQUENCY
ANGULAR FREQUENCY
ANGULAR FREQUENCY
ANGULAR FREQUENCY
ANGULAR FREQUENCY
a.
Conformed to a rule; agreeable to an established rule, law, principle, or type, or to established customary forms; normal; symmetrical; as, a regular verse in poetry; a regular piece of music; a regular verb; regular practice of law or medicine; a regular building.
a.
Standing by itself; out of the ordinary course; unusual; uncommon; strange; as, a singular phenomenon.
n.
The singular number, or the number denoting one person or thing; a word in the singular number.
adv.
In an angular manner; with of at angles or corners.
a.
Not angular.
a.
Constituted, selected, or conducted in conformity with established usages, rules, or discipline; duly authorized; permanently organized; as, a regular meeting; a regular physican; a regular nomination; regular troops.
a.
Pertaining to, or having the form of, a ring; forming a ring; ringed; ring-shaped; as, annular fibers.
a.
Thorough; complete; unmitigated; as, a regular humbug.
a.
Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as, an angular figure.
a.
Of or pertaining to the throat or neck; as, the jugular vein.
adv.
In an angular manner; angularly.
a.
Denoting one person or thing; as, the singular number; -- opposed to dual and plural.
pl.
of Ungula
a.
Of or pertaining to the jugular vein; as, the jugular foramen.
a.
Each; individual; as, to convey several parcels of land, all and singular.
a.
Measured by an angle; as, angular distance.
v. t.
To make angular.
a.
Fig.: Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female.
a.
Having all the parts of the same kind alike in size and shape; as, a regular flower; a regular sea urchin.
a.
Having the form of a ring; annular.