nounpl. -·tums or -·ta
- a solid figure consisting of the bottom part of a cone or pyramid, the top of which has been cut off by a plane parallel to the base
- the part of a solid figure contained between two parallel planes
Origin of frustumL, a piece, bit from Indo-European an unverified form bhreus-, to break, crush from base an unverified form bher-, to split, cut from source bore
nounpl. frus·tums, or frus·ta 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.
Origin of frustumLatin frūstum piece broken off
frustum of a pyramid
(plural frustums or frusta)
Latin frustum (“morsel”).