lens
English Thesaurus
1. a transparent optical device used to converge or diverge transmitted light and to form images (noun.artifact)
| hypernym | : | optical device, |
| definition | : | a device for producing or controlling light (noun.artifact) |
| hyponym | : | anastigmat, |
| definition | : | compound lens or lens system designed to be free of astigmatism and able to form approximately point images (noun.artifact) |
| hyponym | : | anastigmatic lens, |
| definition | : | a lens designed to correct astigmatism (noun.artifact) |
| hyponym | : | compound lens, |
| definition | : | a lens system consisting of two or more lenses on the same axis (noun.artifact) |
| hyponym | : | contact, contact lens, |
| definition | : | a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication (noun.artifact) |
| hyponym | : | converging lens, convex lens, |
| definition | : | lens such that a beam of light passing through it is brought to a point or focus (noun.artifact) |
| hyponym | : | crown lens, |
| definition | : | a lens made of optical crown glass (noun.artifact) |
| hyponym | : | concave lens, diverging lens, |
| definition | : | a lens such that a parallel beam of light passing through it is caused to diverge or spread out (noun.artifact) |
| hyponym | : | eyepiece, ocular, |
| definition | : | combination of lenses at the viewing end of optical instruments (noun.artifact) |
| hyponym | : | field lens, |
| definition | : | the lens that is farthest from the eye in an optical device with more than one lens (noun.artifact) |
| hyponym | : | fresnel lens, |
| definition | : | lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length (noun.artifact) |
| hyponym | : | intraocular lens, |
| definition | : | an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed (noun.artifact) |
| hyponym | : | meniscus, |
| definition | : | (optics) a lens that is concave on one side and convex on the other (noun.artifact) |
| hyponym | : | eyeglass, monocle, |
| definition | : | lens for correcting defective vision in one eye; held in place by facial muscles (noun.artifact) |
| part meronym | : | optical instrument, |
| definition | : | an instrument designed to aid vision (noun.artifact) |
2. electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons (noun.artifact)
| hypernym | : | electronic equipment, |
| definition | : | equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor) (noun.artifact) |
3. biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina (noun.body)
| hypernym | : | organ, |
| definition | : | a fully differentiated structural and functional unit in an animal that is specialized for some particular function (noun.body) |
| part holonym | : | cortex, lens cortex, |
| definition | : | the tissue that surrounds the lens nucleus (noun.body) |
| part holonym | : | lens capsule, |
| definition | : | a tenuous mesoblastic membrane surrounding the lens of the eye (noun.body) |
| part meronym | : | eye, oculus, optic, |
| definition | : | the organ of sight (noun.body) |
4. (metaphor) a channel through which something can be seen or understood (noun.communication)
5. genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils (noun.plant)
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