[lenz] /lɛnz/

noun, plural lenses.
a piece of transparent substance, usually glass, having two opposite surfaces either both curved or one curved and one plane, used in an optical device in changing the convergence of light rays, as for magnification, or in correcting defects of vision.
a combination of such pieces.
some analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
Anatomy. .
Geology. a body of rock or ore that is thick in the middle and thinner toward the edges, similar in shape to a biconvex lens.
verb (used with object)
Movies. to film (a motion picture).
a piece of glass or other transparent material, used to converge or diverge transmitted light and form optical images
Also called compound lens. a combination of such lenses for forming images or concentrating a beam of light
a device that diverges or converges a beam of electromagnetic radiation, sound, or particles See electron lens
(anatomy) See crystalline lens
/lenz; French lɑ̃/
an industrial town in N France, in the Pas de Calais department; badly damaged in both World Wars. Pop: 36 206 (1999)

1690s, “glass to regulate light rays,” from Latin lens (genitive lentis) “lentil,” on analogy of the double-convex shape. See lentil. Of the eye from 1719.

In the vernacular of the photographer, anyone crowding to the front of a group, staring into the lens, or otherwise attracting attention to himself is known as a “lens louse.” [“American Photography,” vol. 40, 1946; the term dates from 1915]

lens (lěnz)
n. pl. lens·es

lensed adj.

A piece of transparent material, such as glass, that forms an image from the rays of light passing through it. (See focal length, refraction, and telescope.)

A clear, almost spherical structure located just behind the pupil of the eye. The lens focuses waves of light on the retina.


Read Also:

  • Lensman

    [lenz-muh n] /ˈlɛnz mən/ noun, plural lensmen. Informal. 1. a photographer.

  • Lens pit

    lens pit n. Either of a pair of depressions in the superficial ectoderm of the embryonic head where the lens develops.

  • Lens vesicle

    lens vesicle n. The ectodermal invagination in the embryo that forms opposite the optic cup and is the lens primordium. Also called lenticular vesicle.

  • Lent

    [lent] /lɛnt/ verb 1. simple past tense and past participle of . [lent] /lɛnt/ noun 1. (in the Christian religion) an annual season of fasting and penitence in preparation for Easter, beginning on Ash Wednesday and lasting 40 weekdays to Easter, observed by Roman Catholic, Anglican, and certain other churches. [lend] /lɛnd/ verb (used with […]

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