Definition of lens

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Lens (n.) A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure..

Lern More About Lens

Bruiser :: Bruiser (n.) A concave tool used in grinding lenses or the speculums of telescopes.
Declension :: Declension (n.) A falling off towards a worse state; a downward tendency; deterioration; decay; as, the declension of virtue, of science, of a state, etc..
Heteroclite :: Heteroclite (n.) A word which is irregular or anomalous either in declension or conjugation, or which deviates from ordinary forms of inflection in words of a like kind; especially, a noun which is irregular in declension..
Periscope :: Periscope (n.) an optical instrument of tubular shape containing an arrangement of lenses and mirrors (or prisms), allowing a person to observe a field of view otherwise obstructed, as beyond an obstructing object or (as in submarines) above the surface of the water..
Rue :: Rue (n.) A perennial suffrutescent plant (Ruta graveolens), having a strong, heavy odor and a bitter taste; herb of grace. It is used in medicine..
Glass :: Glass (v. t.) An optical glass; a lens; a spyglass; -- in the plural, spectacles; as, a pair of glasses; he wears glasses..
Declensional :: Declensional (a.) Belonging to declension.
Presbyopia :: Presbyopia () A defect of vision consequent upon advancing age. It is due to rigidity of the crystalline lens, which produces difficulty of accommodation and recession of the near point of vision, so that objects very near the eyes can not be seen distinctly without the use of convex glasses. Called also presbytia..
Declension :: Declension (n.) Rehearsing a word as declined.
Declinable :: Declinable (a.) Capable of being declined; admitting of declension or inflection; as, declinable parts of speech..
Lenticularly :: Lenticularly (adv.) In the manner of a lens; with a curve.
Fabricate :: Fabricate (v. t.) To form by art and labor; to manufacture; to produce; as, to fabricate woolens..
Gemul :: Gemul (n.) A small South American deer (Furcifer Chilensis), with simple forked horns..
Declension :: Declension (n.) The act or the state of declining; declination; descent; slope.
Celery :: Celery (n.) A plant of the Parsley family (Apium graveolens), of which the blanched leafstalks are used as a salad..
Declination :: Declination (n.) The act of inflecting a word; declension. See Decline, v. t., 4..
Smallage :: Smallage (n.) A biennial umbelliferous plant (Apium graveolens) native of the seacoats of Europe and Asia. When deprived of its acrid and even poisonous properties by cultivation, it becomes celery..
Megalethoscope :: Megalethoscope (n.) An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.
Power :: Power (n.) The degree to which a lens, mirror, or any optical instrument, magnifies; in the telescope, and usually in the microscope, the number of times it multiplies, or augments, the apparent diameter of an object; sometimes, in microscopes, the number of times it multiplies the apparent surface..
Reversal :: Reversal (n.) The act of reversing; the causing to move or face in an opposite direction, or to stand or lie in an inverted position; as, the reversal of a rotating wheel; the reversal of objects by a convex lens..
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