Cone
CONE, noun [It coincides in radical sense with the root of can and begin.]
1. A solid body or figure having a circle for its base, and its top terminated in a point or vertex, like a sugar loaf.
2. In botany, the conical fruit of several evergreen trees, as of the pine, fir, cedar, and cypress. It is composed of woody scales, usually opening , and has a seed at the base of each scale.
A cone of rays, in optics, includes all the rays of light which proceed from a radiant point and fall upon the surface of a glass.
A right cone is when its axis is perpendicular to its base, and its sides equal. It is formed by the revolution of a right-angle plane triangle about one of its sides.
A scalene cone is when its axis is inclined to its base and its sides unequal.