Cone of rays
Cone Cone (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right-angled triangle about one of the sides adjacent to the right angle; -- called also a {right cone}. More generally, any solid having a vertical point and bounded by a surface which is described by a straight line always passing through that vertical point; a solid having a circle for its base and tapering to a point or vertex. [1913 Webster]

2. Anything shaped more or less like a mathematical cone; as, a volcanic cone, a collection of scori[ae] around the crater of a volcano, usually heaped up in a conical form. [1913 Webster]

Now had Night measured with her shadowy cone Half way up hill this vast sublunar vault. --Milton. [1913 Webster]

3. (Bot.) The fruit or strobile of the {Conifer[ae]}, as of the pine, fir, cedar, and cypress. It is composed of woody scales, each one of which has one or two seeds at its base. [1913 Webster]

4. (Zo["o]l.) A shell of the genus {Conus}, having a conical form. [1913 Webster]

{Cone of rays} (Opt.), the pencil of rays of light which proceed from a radiant point to a given surface, as that of a lens, or conversely.

{Cone pulley}. See in the Vocabulary.

{Oblique cone} or {Scalene cone}, a cone of which the axis is inclined to the plane of its base.

{Eight cone}. See {Cone}, 1. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Cone of curves — In mathematics, the cone of toot (sometimes the Kleiman Mori cone) of an algebraic variety X is a combinatorial invariant of much importance to the birational geometry of X. Contents 1 Definition 2 Applications 3 …   Wikipedia

  • Cone — (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right angled triangle about one of the… …   The Collaborative International Dictionary of English

  • Cone pulley — Cone Cone (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right angled triangle about… …   The Collaborative International Dictionary of English

  • Cone — This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article …   Wikipedia

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  • Cone — A type of specialized light sensitive cell (photoreceptor) in the retina of the eye that provide sharp central vision and color vision. By contrast, the rods are the retinal photoreceptors that provide side vision and the ability to see objects… …   Medical dictionary

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  • Eight cone — Cone Cone (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right angled triangle about… …   The Collaborative International Dictionary of English

  • Oblique cone — Cone Cone (k[=o]n?), n. [L. conus cone (in sense 1), Gr. kw^nos; akin to Skr. [,c]ana whetstone, L. cuneus wedge, and prob. to E. hone. See {Hone}, n.] 1. (Geom.) A solid of the form described by the revolution of a right angled triangle about… …   The Collaborative International Dictionary of English

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