- the part of a conical solid left after cutting off a top portion with a plane parallel to the base.
- the part of a solid, as a cone or pyramid, between two usually parallel cutting planes.
Origin of frustum
Examples from the Web for frustum
Historical Examples of frustum
Wa'al, jest cut off the top, and what's left will be the frustum.The Light Keepers
Then follows, in most textbooks, a theorem relating to the volume of a frustum.
The top of the piston forms the frustum of the cone and the pistons are 110 mm.Aviation Engines
Victor Wilfred Pag
A stick of timber is in the shape of the frustum of a square pyramid, the lower base being 22 in.The Psychology of Arithmetic
Edward L. Thorndike
This leads to the corollary concerning the lateral area of the frustum of a regular pyramid.
- the part of a solid, such as a cone or pyramid, contained between the base and a plane parallel to the base that intersects the solid
- the part of such a solid contained between two parallel planes intersecting the solid
- architect a single drum of a column or a single stone used to construct a pier
Word Origin for frustum
1650s, from Latin frustum "piece broken off," from PIE *bhrus-to-, from root *bhreu- "to cut, break up."