Search references for SOLID FUEL. Phrases containing SOLID FUEL
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Solid material that can be burnt to release energy
Solid fuels can be contrasted with liquid fuels and gaseous fuels. Common examples of solid fuels include wood, charcoal, peat, coal, hexamine fuel tablets
Solid_fuel
Rocket with a motor that uses solid propellants
solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer). The earliest rockets were solid-fuel
Solid-propellant_rocket
Fuel cell that produces electricity by oxidization
A solid oxide fuel cell (or SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized
Solid_oxide_fuel_cell
Chemical or mixture used in a rocket engine
orbital launch vehicles use solid-fueled rockets in their boost stages (solid rocket boosters) for this reason. Solid-fuel rockets have lower specific
Rocket_propellant
Material used to create heat and energy
corn, wheat, rye and other grains. Solid-fuel rocket technology also uses solid fuel (see solid propellants). Solid fuels have been used by humanity for many
Fuel
Indian missile propulsion system
Solid Fuel Ducted Ramjet (SFDR) is a missile propulsion system currently being developed by the Defence Research and Development Organisation of India
Solid_Fuel_Ducted_Ramjet
North Korean mobile intercontinental ballistic missile
18') is a North Korean three-stage solid-fuelled intercontinental ballistic missile (ICBM). It is the first solid-fueled ICBM developed by North Korea, and
Hwasong-18
Supersonic atmospheric jet engine
speed. In a solid fuel integrated rocket ramjet (SFIRR), the solid fuel is cast along the outer wall of the ramcombustor. In this case, fuel injection is
Ramjet
longer-range systems (e.g. the liquid-fueled Shahab-3 MRBM, based on the Scud-C) and began testing two-stage solid-fueled designs (e.g. the Sejjil-2 MRBM)
Ballistic missile program of Iran
Ballistic_missile_program_of_Iran
South Korean orbital launch vehicle
South Korea's solid‑fuel space launch vehicle, commonly abbreviated GYŪB (Korean: Goche Yeonlyo Uju Balsache or 고체연료 우주발사체), is an orbital booster developed
Solid-fuel space launch vehicle
Solid-fuel_space_launch_vehicle
American very long-range air-to-air missile
from the marked lack of the solid-fuel rocket Mk 72 booster on the AIM-174. The missile will likely utilize a solid-fuel rocket engine, as carried by
AIM-174B_Gunslinger
Aerospace service branch of Iran's Islamic Revolutionary Guard Corps
the Shahab-3, also known as the Ghadr-101. It has a liquid-fuel first stage and a solid-fuel second stage, which allows it to have a range of 2,000 km
Islamic Revolutionary Guard Corps Aerospace Force
Islamic_Revolutionary_Guard_Corps_Aerospace_Force
Material fuelling nuclear reactors
Nuclear fuel refers to any substance which is used by nuclear reactors or other nuclear devices as fuel to generate energy. Nuclear fuel contains fissile
Nuclear_fuel
Supercavitating torpedo
launched from 533 mm (21 in) torpedo tubes at 50 kn (93 km/h; 58 mph). A solid-fuel rocket accelerates it to cavitation speed, with a combined-cycle gas turbine
VA-111_Shkval
Solid propellant rocket used by the Space Shuttle
the oxidizer along with aluminum powder and PBAN as fuel. The total propellant load for each solid rocket motor weighed approximately 1,100,000 lb (500 t)
Space Shuttle Solid Rocket Booster
Space_Shuttle_Solid_Rocket_Booster
Solid propellant motor used to augment the thrust of a rocket
booster – Same as a solid rocket booster, but uses liquid instead of solid fuel Solid-fuel rocket Graphite-epoxy motor – American solid rocket booster Comparison
Solid_rocket_booster
Device that converts the chemical energy from a fuel into electricity
membrane fuel cells (PEM fuel cells, or PEMFC) to 10 minutes for solid oxide fuel cells (SOFC). A related technology is flow batteries, in which the fuel can
Fuel_cell
Rocket engine that uses liquid fuels and oxidizers
hybrid rockets, with some of the advantages of a solid rocket. Bipropellant liquid rockets use a liquid fuel such as liquid hydrogen or RP-1, and a liquid
Liquid-propellant_rocket
space vehicles Comparison of space station cargo vehicles Comparison of solid-fuelled orbital launch systems List of space launch system designs List of orbital
Comparison of orbital rocket engines
Comparison_of_orbital_rocket_engines
Type of surface-to-air missile
high-altitude supersonic targets. It evolved into a much larger missile with two solid fuel stages that provided three times the range of the Ajax. Deployment began
Nike_Hercules
U.S. anti-ship missile
Fixed-wing aircraft (AGM-84), without the solid-fuel rocket booster Surface ships (RGM-84), fitted with a solid-fuel rocket booster that detaches when expended
Harpoon_(missile)
American ICBM
that a solid-fuel rocket motor could stand ready to launch for long periods of time, in contrast to liquid-fueled rockets that required fueling before
LGM-30_Minuteman
Military technology test facility in Utah
Tekoi Rocket Test Range is a former solid fuel rocket motor test and calibration site operated by Hercules Aerospace near the Utah Test and Training Range
Tekoi
US/UK SLBM
plasticized polyether, the 75 represents that the fuel contains 75% solids.) The solid components bound by fuel binder are HMX, aluminum, and ammonium perchlorate
UGM-133_Trident_II
American rocket engineer (1914–1952)
rocket propellant, and pioneered the advancement of both liquid-fuel and solid-fuel rockets. Parsons was raised in Pasadena, California. He began amateur
Jack_Parsons
Solid-fuel rocket motor that can restart
defined as a multiple-pulse solid-fuel rocket motor. This design overcomes difficulties shutting down and reigniting solid propellant motors. The pulse
Pulsed_rocket_motor
Wick embedded in solid flammable substance
of solid fuel (the wax), which vaporizes and combines with oxygen in the air to form a flame. The flame then melts the top of the mass of solid fuel, which
Candle
Cooking stove specially designed to be portable and lightweight
broad categories based on the type of fuel used and stove design: unpressurized stoves that use solid or liquid fuel placed in the burner before ignition;
Portable_stove
Newest line of solid-fuel IRBM tested by North Korea in 2024
and Hwasong-12B, as well as the first solid-fueled IRBM of North Korea. Hwasong-16B is a two-stage, solid-fueled missile. It is estimated to be 21 m (69 ft)
Hwasong-16B
Solid fuel in tablet form
A hexamine fuel tablet (or heat tablet, Esbit) is a form of solid fuel in tablet form. The tablets burn smokelessly, have a high energy density, do not
Hexamine_fuel_tablet
Indian beyond-visual-range air-to-air missile
Mark-3, incorporate an air-breathing propulsion system designated as Solid Fuel Ducted Ramjet setting it apart from the predecessors. By dimensions, the
Astra_(missile)
Surface-to-air missile
opera series Der Ring des Nibelungen. The missile was a multi-stage solid fuelled rocket. It had four small varnished plywood control surfaces, resembling
Rheintochter
North Korean ICBM under development
(Korean: 《화성포-20》형; lit. 'Mars Artillery Type 20') is a North Korean solid-fueled intercontinental ballistic missile (ICBM). First revealed in September
Hwasong-20
Indian ballistic missile
comprises the following: The two-stage Agni technology demonstrator, with a solid-fuel first stage, was first tested at the Interim Test Range in Chandipur in
Agni_(missile)
Coal product used in the process of making steel
Coke is a grey, hard, and porous coal-based fuel with a high carbon content. It is made by heating coal or petroleum in the absence of air. Coke is an
Coke_(fuel)
Vehicle propelled by ejection of gases
used in most liquid-propellant rockets), a solid combination of fuel with oxidizer (solid fuel), or solid fuel with liquid or gaseous oxidizer (hybrid propellant
Rocket
Unguided ballistic artillery rocket
as Rh Z 61/9 and Raketen-Sprenggranate 4831, was a German four-stage, solid-fuel, unguided ballistic artillery rocket developed by Rheinmetall-Borsig during
Rheinbote
Non-airbreathing engine used to propel a missile or vehicle
of the propellant: Solid-fuel rockets (or solid-propellant rockets or motors) are chemical rockets which use propellant in a solid state. Liquid-propellant
Rocket_engine
Solid acid fuel cells (SAFCs) are a class of fuel cells characterized by the use of a solid acid material as the electrolyte. Similar to proton exchange
Solid_acid_fuel_cell
Hot lump of slowly burning solid fuel
An ember, also called a hot coal, is a hot lump of smouldering solid fuel, typically glowing, composed of greatly heated wood, coal, or other carbon-based
Ember
Indian military defence system, established 2000
MachineThe interceptor rocket has a liquid-fuelled first stage that uses two propellants and oxidisers, and a solid-fuel second stage with a gas thruster that
Indian Ballistic Missile Defence Programme
Indian_Ballistic_Missile_Defence_Programme
Solid fuel without emitting smoke
Smokeless fuel is a type of solid fuel which either does not emit visible smoke or emits minimal amounts during combustion. These types of fuel find use
Smokeless_fuel
Iranian medium-range ballistic missile
@JamesMartinCNS OSINT team is we're seeing more debris from newer Fattah-1 solid-fuel missiles than we did in April, which may explain the apparently more successful
Fattah-1
South Korean missile series
would not have been permitted. It is thought to be powered by a two-stage solid-fuel engine, with an estimated length of about 16 m and a diameter of 1.6 m
Hyunmoo
American physicist and inventor (1882–1945)
liquid-fueled rocket, which was successfully launched on March 16, 1926. By 1915 his pioneering work had dramatically improved the efficiency of the solid-fueled
Robert_H._Goddard
Soviet rocketry commenced in 1921 with development of solid-fuel rockets, which resulted in the development of the Katyusha rocket launcher. Rocket scientists
Soviet_rocketry
Submarine-launched ballistic missile
The UGM-27 Polaris missile was a two-stage solid-fueled nuclear-armed submarine-launched ballistic missile (SLBM). As the United States Navy's first SLBM
UGM-27_Polaris
U.S. man-portable surface-to-air missile
a safe distance from the operator before engaging the main two-stage solid-fuel sustainer, which accelerates it to a maximum speed of Mach 2.54 (1,930 mph;
FIM-92_Stinger
Container used to burn charcoal or other solid fuel
A brazier (/ˈbreɪʒər/) is a container used to burn charcoal or other solid fuel for cooking, heating, or rituals. It often takes the form of a metal box
Brazier
Intermediate-range ballistic missile
two-stage, solid-propellant intermediate-range ballistic missile (IRBM). The first stage was inherited from the S2, with a P16 solid fuel engine and 4
S3_(missile)
Ukrainian defence technology company
it has been simplified. Using a "hot launch", the missile "ignites its solid-fuel motor directly from the launcher and travels along an inclined guide rail
Fire_Point_(Ukrainian_firm)
Experimental solid-fuel research rocket
The Lockheed X-17 was a three-stage solid-fuel research rocket to test the effects of high mach atmospheric reentry. The first stage of the X-17 carried
Lockheed_X-17
Device producing a high-temperature explosion
to enhance the blast. Jemaah Islamiyah bombers used a shock-dispersed solid fuel charge, based on the thermobaric principle, to attack the Sari nightclub
Thermobaric_weapon
Type of nuclear reactor cooled by molten material
produce the solid fuel and process spent nuclear fuel. The MSFR can operate using a large variety of fuel compositions due to its on-line fuel control and
Molten-salt_reactor
Rocket engine that uses both liquid / gaseous and solid fuel
than solid ones, but they avoid significant hazards of manufacturing, shipping and handling solid rocket motors by storing the oxidizer and the fuel separately
Hybrid-propellant_rocket
Self-propelled guided weapon system
rockets propelled by jet engines. In the 1920s, Soviet Union developed solid fuel rockets at the Gas Dynamics Laboratory. Later, the first missiles to be
Missile
Chemical substance used for propulsion
plasma, or a solid. In powered aircraft without propellers such as jets, the propellant is usually the product of the burning of fuel with atmospheric
Propellant
Fuels which under ordinary conditions, are gaseous
transmitted and distributed through pipes. Fuel gas is contrasted with liquid fuels and solid fuels, although some fuel gases are liquefied for storage or transport
Fuel_gas
Missile program of the United States Army
Douglas-built missile was a two-stage missile using a solid fuel booster stage and a liquid fueled (IRFNA/UDMH) second stage. The missile could reach a
Project_Nike
Type of aircraft assisted take-off
introduced such systems in World War II. The British system used fairly large solid fuel rockets to shoot planes (typically the Hawker Hurricane) off a small ramp
JATO
external reforming of natural gas. However, fuels cells operating at high temperature such as the solid oxide fuel cell (SOFC) are not poisoned by carbon monoxide
Integrated gasification fuel cell cycle
Integrated_gasification_fuel_cell_cycle
American weapons and munitions company (1912–2008)
administration building. One of its major solid-fuel rocket products was the third-stage engine for the three -stage solid-fueled Minuteman intercontinental ballistic
Hercules_Inc.
Retired American solid rocket stage
"BE-3". Encyclopedia Astronautica. Retrieved 11 May 2026. "Rocket Motor, Solid Fuel, Mockup, BE-3-B". National Air and Space Museum. Retrieved 15 May 2026
BE-3_(solid_motor)
Rocket designed to take measurements during its flight
a measurement." The basic elements of a modern sounding rocket are a solid-fuel rocket motor and a science payload. In certain sounding rockets, the payload
Sounding_rocket
of the Star-37 solid fuel rocket. Voyager 1 fourth stage, a Star 37E solid fuel rocket. Voyager 2 fourth stage, a Star 37E solid fuel rocket. New Horizons
List of artificial objects leaving the Solar System
List_of_artificial_objects_leaving_the_Solar_System
Kinetic anti ballistic missile (Aegis Ballistic Missile Defense System)
Aegis weapon system calculates a fire-control solution. The Aerojet Mk 72 solid-fuel rocket booster launches the SM-3 from the ship's Mark 41 Vertical Launching
RIM-161_Standard_Missile_3
Liquids that can be used to create energy
transportation and the economy. Liquid fuels are contrasted with solid fuels and gaseous fuels. Some common properties of liquid fuels are that they are easy to transport
Liquid_fuel
Iranian Intermediate Range Ballistic Missile
a family of Iranian solid-fueled intermediate-range ballistic missiles. The Sejil are replacements for the Shahab liquid-fueled ballistic missiles. According
Sejjil
South Korean Aerospace company
adoption of cutting-edge technologies were intended to allow it to be 10% more fuel efficient than existing rivals. The flight test program was completed successfully
Korea_Aerospace_Industries
Extracted combustible fraction of municipal and other solid waste
Refuse-derived fuel (RDF) is a fuel produced from various types of waste such as municipal solid waste (MSW), industrial waste or commercial waste. The
Refuse-derived_fuel
Miniature solid-fuel rocket motor
The Jetex motor is a miniature solid-fuel rocket motor produced for use as a powerplant for flying model aircraft. Its production led to a number of imitators
Jetex
Japanese rocket suicide-attack aircraft
200-kilogram (2,600 lb) warhead and was powered by three Type 4 Model 1 Mark 20 solid-fuel rocket motors. Starting on 21 March 1945, the Ohka flew combat missions
Yokosuka_MXY-7_Ohka
Type of rocket engine fuel
a Titan-II in its silo, led to their near universal replacement with solid-fuel boosters, first in Western submarine-launched ballistic missiles and then
Hypergolic_propellant
Missile that follows a sub-orbital ballistic flightpath
early ICBMs, including Atlas and Titan, followed by the solid-fuel Minuteman family. Solid-fuel missiles improved readiness because they could be stored
Ballistic_missile
Submarine-launched ballistic missile
debuted at the 2025 China Victory Day Parade. The JL-3 is reported as a solid-fueled missile with ranges of over 9,000 km (5,600 mi) or 5,400 nmi (10,000 km)
JL-3
Chinese strategic ballistic missile series
early Dongfeng development. The DF-61 and DF-41 are examples of modern solid-fuel nuclear-armed ICBMs deployed by China. Conventional warheads are also
Dongfeng_(missile)
Space Shuttle Challenger disaster report
between the vertically stacked cylindrical sections that made up the solid fuel booster. NASA managers recorded this as demonstrating that the O-rings
Rogers_Commission_Report
Fuel from carbon monoxide and hydrogen
from gasification of solid feedstocks such as coal or biomass or by reforming of natural gas. Common ways for refining synthetic fuels include the Fischer–Tropsch
Synthetic_fuel
First operational guided surface-to-air missile
launched under the thrust of a solid-fuel booster which was then to be dropped; thence, self-propelled by a liquid-fuel motor, the missile should be guided
MIM-3_Nike_Ajax
Russian submarine-launched ballistic missile
missile was launched in the late 1990s as a replacement for the R-39 Rif solid-fuel SLBM. The Project 955/955A Borei-class submarines carry 16 missiles per
RSM-56_Bulava
Topics referred to by the same term
Army missile project MIM-3 Nike Ajax, a solid fuel–propelled surface-to-air missile Nike Hercules, a solid fuel–propelled surface-to-air missile Nike (rocket
Nike
Indian anti-ship missile system
an additional solid-fuel rocket booster. Range: 350 kilometres (220 mi). Submarine-launched variant: Will include an additional solid-fuel rocket booster
NASM-MR
European beyond visual range air-to-air missile
(ECM) environment with a range in excess of 200 kilometres (110 nmi). A solid-fueled ramjet motor allows the missile to cruise at a speed of over Mach 4 and
Meteor_(missile)
American air-to-surface missile
against large, hard targets. The propulsion system for both types is a solid-fuel rocket motor behind the warhead. The Maverick missile is unable to lock
AGM-65_Maverick
Iranian medium-range ballistic missile
Kheibar Shekan or Kheibarshekan (Persian: خیبرشکن) is an Iranian solid-fuel medium-range ballistic missile operated by the Islamic Revolutionary Guard
Kheibar_Shekan
North Korea hypersonic ballistic missile
two-stage, solid-fueled hypersonic, intermediate-range ballistic missile first tested in January 2024. The Hwasong-16A is a two-stage, solid-fueled missile
Hwasong-16A
Indian road-mobile ICBM
000 km (5,000 mi). It is a three-stage, road-mobile, canisterised and solid-fueled ballistic missile. Agni-V was primarily intended for enhancing the Indian
Agni-V
Indian defense projects under DRDO
Navy. Astra Mk 2 and Astra Mk 3 variants are in testing phase. It is a solid fuel short range tactical missile under development based on the technology
Projects_of_DRDO
Heating device
heat from a solid fuel fire in the mass of the masonry heater through internal heat-exchange flue channels, to enable a charge of solid fuel (mixed with
Masonry_heater
MRBM/IRBM
Chinese: 东风; traditional Chinese: 東風; lit. 'East Wind') is a two-stage, solid-fuel, single-warhead medium-range ballistic missile (MRBM) developed by China's
DF-21
British ration heater of WW1/WW2
continued using compact solid fuel stoves until recently when they were replaced by stoves powered by alcohol gel. Tommy cookers were fuelled by a substance referred
Tommy_cooker
Chemical reaction between a fuel and oxygen
elementary radical reactions. Solid fuels, such as wood and coal, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies
Combustion
Comparison of all orbital launch systems
main categories: Solid-propellant rockets or solid-fuel rockets have a motor that uses solid propellants, typically a mix of powdered fuel and oxidizer held
Comparison of orbital launch systems
Comparison_of_orbital_launch_systems
Type of nuclear reactor that uses molten material as fuel
for cooling only (fluoride high-temperature reactors) and still have a solid fuel. Molten salt reactors, as a class, include both burners and breeders in
Liquid fluoride thorium reactor
Liquid_fluoride_thorium_reactor
road-mobile single-stage solid-fueled surface-to-surface missile Fateh-313 solid-fueled SRBM Fateh Mobin single-stage solid-propelled Terminal Infrared
List_of_missiles_by_country
American long-range air-to-air missile
range was extended to 100 miles (160 km), using the Aerojet-General XM59 solid-fuel motor. The SARH seeker was a powerful system of its own, with the resolution
AIM-47_Falcon
Defunct American rocket and missile propulsion manufacturer
design was tested on August 16, 1941, consisting of a small cylindrical solid-fuel motor attached to the bottom of a plane. Takeoff distance was shortened
Aerojet
First rockets
of rockets, concluding that conventional solid-fuel rockets needed to be improved in three ways. First, fuel should be burned in a small combustion chamber
History_of_rockets
Chinese intercontinental ballistic missile
CH-SS-20; previously reported as CSS-10) is a fourth-generation Chinese solid-fuelled road-mobile intercontinental ballistic missile operated by the People's
DF-41
Ballistic missile with a range of more than 5,500 kilometres
which require fuelling before launch, meaning high response time and low availability. Solid-propellant ICBMs do not require fuelling, having a much
Intercontinental ballistic missile
Intercontinental_ballistic_missile
SOLID FUEL
SOLID FUEL
Boy/Male
Indian
Solid
Surname or Lastname
Spanish and Asturian-Leonese (SolÃs)
Spanish and Asturian-Leonese (SolÃs) : habitational name from SolÃs in Asturies or a similarly named place elsewhere.English : from a medieval personal name bestowed on a child born after the death of a sibling, from Middle English solace ‘comfort’, ‘consolation’. The word also came to have the sense ‘delight’, ‘amusement’, and in some cases the surname may have arisen from a nickname for a playful or entertaining person.
Boy/Male
Arabic, Muslim
Solid
Boy/Male
Hindu, Indian
Solid Redemption
Girl/Female
Muslim
Strong, Solid
Boy/Male
Indian
Firm, Solid
Boy/Male
Indian, Sanskrit
Strong; Solid
Boy/Male
Muslim
Solid
Boy/Male
Arabic, Muslim, Parsi
Firm; Solid
Girl/Female
Indian
Firm, Solid, Determined
Biblical
nativity; generation;begetter;
Boy/Male
Muslim/Islamic
Solid
Girl/Female
Arabic, British, Danish, English, Muslim
Solid; Strong
Boy/Male
Muslim/Islamic
Firm Solid
Boy/Male
Muslim
Firm, Solid
Boy/Male
Indian
Solid structure
Boy/Male
Muslim
Solid structure
Girl/Female
Biblical
Nativity, generation.
Girl/Female
Indian
Strong, Solid
Boy/Male
Tamil
Solid redemption
SOLID FUEL
SOLID FUEL
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Oriya, Sindhi, Tamil, Telugu
Life of the World
Girl/Female
American, Australian, British, Christian, English, German, Lebanese, Swedish, Teutonic
Noble; Nobility; Kind; Brightness; Sweet
Girl/Female
American, Australian, British, English, French, German
Mighty with a Spear; Variant of Geraldine; Spear Ruler
Boy/Male
Muslim/Islamic
Pure
Boy/Male
Indian
Girl/Female
Arabic, English, Gujarati, Hindu, Indian, Kannada, Kashmiri, Malayalam, Marathi, Muslim, Telugu
Brightness; Snow White
Boy/Male
Tamil
Devdarsh | தேவà¯à®¤à®°à¯à®·
Worshipper of God
Girl/Female
Tamil
Marakatham | மாரகாதம
Boy/Male
Indian, Sanskrit
Destroyer of Foes
Girl/Female
Arabic, Indian
Eyes
SOLID FUEL
SOLID FUEL
SOLID FUEL
SOLID FUEL
SOLID FUEL
superl.
Solid; nourishing; as, strong meat.
a.
Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; -- opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand.
a.
Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.
n.
The art of delineating the forms of solid bodies on a plane; a branch of solid geometry which shows the construction of all solids which are regularly defined.
n.
Solid coal on the side of a gallery; solid ore in a vein.
a.
Not having the lines separated by leads; not open.
a.
Applied to a compound word whose parts are closely united and form an unbroken word; -- opposed to hyphened.
a.
Partially solid.
a.
Enduring; solid; firm; substantial.
v. i.
To become solid; to harden.
a.
Of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem.
a.
Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.
a.
Sound; not weakly; as, a solid constitution of body.
a.
Solid; gross; opaque.
a.
Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.
n.
A magnitude which has length, breadth, and thickness; a part of space bounded on all sides.
n.
A substance that is held in a fixed form by cohesion among its particles; a substance not fluid.
a.
Fig.: Worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine.
a.
United; without division; unanimous; as, the delegation is solid for a candidate.
a.
Impenetrable; resisting or excluding any other material particle or atom from any given portion of space; -- applied to the supposed ultimate particles of matter.