Cone (?), v. t. To render cone-shaped; to bevel like
the circular segment of a
cone; as, to
cone the tires of car wheels.
||Cone (?), n. [L. conus cone (in sense 1), Gr. &?;; akin to Skr. çana 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.
2. Anything shaped more or less
like a mathematical cone; as, a volcanic cone, a collection of scoriæ around the crater of a volcano, usually heaped up in a conical form.
Now
had Night measured with her shadowy cone
Half way up hill this vast sublunar vault.
Milton.
3. (Bot.) The fruit or strobile of the Coniferæ, 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.
4. (Zoöl.) A shell of the
genus Conus, having a conical form.
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 or Scalene cone, a cone of which the axis is inclined to the plane of
its base. -- Eight cone. See Cone, 1.
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