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

• A lot of rage about decaying material in part of cone
• Female runs American Corporation, part of a solid foundation
• Curtailed cone, in geometry
• Part of a solid, in geometry

Wikipedia Word definitions in Wikipedia
In geometry , a frustum (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 . The term is commonly used ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Frustum \Frus"tum\, n.; pl. L. Frusta , E. Frustums . [L. fruslum piece, bit.] (Geom.) 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 ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"remaining piece after a part has been cut off," 1650s, in mathematics, from Latin frustum "piece broken off," from PIE *bhrus-to- , from root *bhreu- "to cut, break up" (see bruise (v.)).

Wiktionary Word definitions in Wiktionary
n. 1 A cone or pyramid whose tip has been truncated by a plane parallel to its base. 2 A portion of a sphere delimited by two parallel planes.

WordNet Word definitions in WordNet
n. 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 [also: frusta (pl)]