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What is the meaning of LENS. Phrases containing LENS
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LENS
LENS
See under Lens.
LENS
n.
An optical instrument consisting of two lenses set in a light frame, and worn to assist sight, to obviate some defect in the organs of vision, or to shield the eyes from bright light.
n.
The reciprocal of the focal distance of a lens, used as measure of the divergence or convergence of a pencil of rays.
n.
A tool on which lenses are fastened in a group, for polishing or grinding.
n.
A convex lens of glass for producing heat by converging the sun's rays into a focus.
n.
The diaphragm used in optical instruments to cut off the marginal portions of a beam of light passing through lenses.
n.
The half of a lens divided along a plane passing through its axis.
n.
A kind of watch crystal which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles.
pl.
of Lens
a.
Assisting sight, as a lens or the like.
n.
An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.
n.
A lamp with lenses or reflectors to collect the rays of light and throw them in a given direction; -- used in lighthouses.
n.
An instrument with two lenses, by which an image of a single picture projected upon a screen of ground glass is made to present an appearance of relief, and may be viewed by several persons at once.
n.
An instrument for measuring the curvature of spherical surface, as of lenses for telescope, etc.
v. i.
To have the power of causing objects to appear larger than they really are; to increase the apparent dimensions of objects; as, some lenses magnify but little.
n.
One of the transparent lenslike cells in the ocelli of certain arthropods.
n.
A lens convex on one side and concave on the other.
a.
Half lenticular or convex; imperfectly resembling a lens.
n.
A disease of the eye, in which the iris adheres to the cornea or to the capsule of the crystalline lens.
n.
The art or process of exhibiting luminous images, especially those of external objects, in a darkened room, by arrangements of lenses or mirrors.
LENS
LENS