right circular cone

American  

noun

Geometry.

1. a cone whose surface is generated by lines joining a fixed point to the points of a circle, the fixed point lying on a perpendicular through the center of the circle.

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Etymology

Origin of right circular cone

First recorded in 1940–45

Example Sentences

In practice the right circular cone, or cone of revolution, is the important type, and special attention should be given to this form.

From Project Gutenberg

Thus the tangents drawn from any finite centre to a sphere form a right circular cone, and this will be cut by any plane in a conic.

From Project Gutenberg