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

The radius of a right circular cone is increasing at 3 cm/min whereas the height of the cone is decreasing at 2 cm/min.

From Textbooks • Mar. 30, 2016

The base radius and height of a right circular cone are measured as 10 in. and 25 in., respectively, with a possible error in measurement of as much as 0.1 in. each.

From Textbooks • Mar. 30, 2016

A paper cup has the shape of an inverted right circular cone of height 6 in. and radius of top 3 in.

From Textbooks • Mar. 30, 2016

A machinist is constructing a right circular cone out of a block of aluminum.

From Textbooks • Mar. 30, 2016

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 Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various