frustum

frus·tum  (frstm) n. pl. frus·tums or frus·ta (-t) Mathematics 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. [Latin frstum, piece broken off.]

frustum frustum of a pyramid

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frustum [ˈfrʌstəm]

n pl -tums, -ta [-tə]

1. (Mathematics) Geometry

a.  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

b.  the part of such a solid contained between two parallel planes intersecting the solid

2. (Fine Arts & Visual Arts / Architecture) Architect a single drum of a column or a single stone used to construct a pier

[from Latin: piece; probably related to Old English brȳsan to crush, bruise]

Thesaurus

Noun

1.

frustum - 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 solid - a three-dimensional shape truncated pyramid - a frustum formed from a pyramid truncated cone - a frustum formed from a cone