# Crystalline lens

Crystalline lens
Lens Lens (l[e^]nz), n.; pl. {Lenses} (-[e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. {Lentil}.] (Opt.) 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. [1913 Webster] Lenses [1913 Webster]

Note: Of spherical lenses, there are six varieties, as shown in section in the figures herewith given: viz., a plano-concave; b double-concave; c plano-convex; d double-convex; e converging concavo-convex, or converging meniscus; f diverging concavo-convex, or diverging meniscus. [1913 Webster]

{Crossed lens} (Opt.), a double-convex lens with one radius equal to six times the other.

{Crystalline lens}. (Anat.) See {Eye}.

{Fresnel lens} (Opt.), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor.

{Multiplying lens} or {Multiplying glass} (Opt.), a lens one side of which is plane and the other convex, but made up of a number of plane faces inclined to one another, each of which presents a separate image of the object viewed through it, so that the object is, as it were, multiplied.

{Polyzonal lens}. See {Polyzonal}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

### Look at other dictionaries:

• Crystalline lens — Crystalline Crys tal*line (kr?s tal l?n or l?n; 277), a. [L. crystallinus, from Gr. ????: cf. F. cristallin. See {Crystal}.] 1. Consisting, or made, of crystal. [1913 Webster] Mount, eagle, to my palace crystalline. Shak. [1913 Webster] 2. Formed …   The Collaborative International Dictionary of English

• crystalline lens — n the lens of the eye …   Medical dictionary

• crystalline lens — n. LENS (sense 3) …   English World dictionary

• Crystalline lens — Humor Hu mor, n. [OE. humour, OF. humor, umor, F. humeur, L. humor, umor, moisture, fluid, fr. humere, umere, to be moist. See {Humid}.] [Written also {humour}.] 1. Moisture, especially, the moisture or fluid of animal bodies, as the chyle, lymph …   The Collaborative International Dictionary of English

• crystalline lens — lęšiukas statusas T sritis fizika atitikmenys: angl. crystalline lens vok. Augenlinse, f; Kristallinse, f rus. хрусталик, m pranc. cristallin, m …   Fizikos terminų žodynas

• crystalline lens — noun biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina • Syn: ↑lens, ↑lens of the eye • Hypernyms: ↑organ • Part Holonyms: ↑eye, ↑oculus, ↑ …   Useful english dictionary

• crystalline lens — crys′talline lens′ n. oph lens 4) • Etymology: 1785–95 …   From formal English to slang

• crystalline lens — noun Date: 1794 the lens of the eye in vertebrates …   New Collegiate Dictionary

• crystalline lens — noun the lens of the eye …   English new terms dictionary

• crystalline lens — /krɪstəlaɪn ˈlɛnz/ (say kristuhluyn lenz) noun a doubly convex, transparent, lens like body in the eye, situated behind the iris and serving to focus the rays of light on the retina …