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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use frustum in a sentence
When they had reached the frustum's base, Urim descended and, in turn, presented various members of his retinue.Warrior of the Dawn | Howard Carleton Browne
The others amused themselves all around me; I found my delight in the frustum of a pyramid.The Life of the Fly | J. Henri Fabre
The form of the stand is the frustum of a hexagonal pyramid reversed, about six or eight inches in diameter.The History of Sumatra | William Marsden
Of course, when I was taught how to measure a cone, I was also instructed to do the same with the frustum of one.The Boy Tar | Mayne Reid
At ferrum, quod pluit in Taurinis, cuius frustum apud nos extat, qua ex fodina sustulit nubes?On the magnet, magnetick bodies also, and on the great magnet the earth | William Gilbert of Colchester
British Dictionary definitions for frustum
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
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
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