Frustum vs. Frustoconical — What's the Difference?

In geometry, a frustum (borrowed from the Latin for “morsel”, plural: frusta or frustums) is the portion of a solid (normally a cone or pyramid) that lies between one or two parallel planes cutting it. A right frustum is a parallel truncation of a right pyramid or right cone.In computer graphics, the viewing frustum is the three-dimensional region which is visible on the screen.

Having the shape of a frustum of a cone

The part of a solid, such as a cone or pyramid, between two parallel planes cutting the solid, especially the section between the base and a plane parallel to the base.

A cone or pyramid whose tip has been truncated by a plane parallel to its base.

A portion of a sphere, or in general any solid, delimited by two parallel planes.

The part of a solid next the base, formed by cutting off the, top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may be either parallel or inclined to each other.

One of the drums of the shaft of a column.

A truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed