frustum
Americannoun
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the part of a conical solid left after cutting off a top portion with a plane parallel to the base.
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the part of a solid, as a cone or pyramid, between two usually parallel cutting planes.
noun
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geometry
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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
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the part of such a solid contained between two parallel planes intersecting the solid
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architect a single drum of a column or a single stone used to construct a pier
Other Word Forms
Noun Inflected Forms
Etymology
Origin of frustum
1650–60; < Latin: piece, bit; probably akin to Old Irish brúid (he) breaks, Old English brȳsan to crush
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Figure 6.42 A frustum of a cone can approximate a small part of surface area.
From Textbooks • Mar. 30, 2016
Figure 2.42 A frustum of a cone can approximate a small part of surface area.
From Textbooks • Mar. 30, 2016
Note that the slant height of this frustum is just the length of the line segment used to generate it.
From Textbooks • Mar. 30, 2016
Figure 6.44 Calculating the lateral surface area of a frustum of a cone.
From Textbooks • Mar. 30, 2016
The lateral area of a frustum of a cone of revolution is equal to half the sum of the circumferences of its bases multiplied by the slant height.
From The Teaching of Geometry by Smith, David Eugene
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
