Dictionary.com

frustum

[ fruhs-tuhm ]
/ ˈfrʌs təm /
Save This Word!

noun, plural frus·tums, frus·ta [fruhs-tuh]. /ˈfrʌs tə/. Geometry.
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.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of frustum

1650–60; <Latin: piece, bit; probably akin to Old Irish brúid (he) breaks, Old English brȳsan to crush
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use frustum in a sentence

British Dictionary definitions for frustum

frustum
/ (ˈfrʌstəm) /

noun plural -tums or -ta (-tə)
geometry
  1. 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
  2. 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

C17: from Latin: piece; probably related to Old English brӯsan to crush, bruise
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK