nounWord forms: plural ˈfrustums or ˈfrusta (ˈfrʌstə
; frusˈtə) ▶ → truncate verb:transitive 1. 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
2. the part of a solid figure contained between two parallel planes
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'frustum'
L, a piece, bit < IE *bhreus-
, to break, crush < base *bher-
, to split, cut > bore1