frustum
Americannoun
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frustums,
plural
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frusta
plural
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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.
See Examples For:
Figure 2.42 A frustum of a cone can approximate a small part of surface area.
From Textbooks ● Mar. 30, 2016
Figure 6.42 A frustum of a cone can approximate a small part of surface area.
From Textbooks ● Mar. 30, 2016
Figure 2.44 Calculating the lateral surface area of a frustum of a cone.
From Textbooks ● Mar. 30, 2016
Figure 6.44 Calculating the lateral surface area of a frustum of a cone.
From Textbooks ● Mar. 30, 2016
For the frustum of a cone: Add together the squares of the diameters of large and small ends; to this add the product of the diameter of the two ends.
From Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 by Barkham Burroughs
Such constriction produces cells that are neither prisms nor frusta — but the shape that they form has had no name.
From Nature ● Sep. 9, 2018
However, a better understanding of the mechanics of the shared interfaces on the sides of cells will be needed before cell shapes more complex than prisms and frusta can be modelled accurately in three dimensions6.
From Nature ● Sep. 9, 2018
For epithelia on a sphere, surface curvature is the same in all directions, and inverted frusta are expected.
From Nature ● Sep. 9, 2018
It is possible for 3D shapes resembling frusta to form tubes.
From Nature ● Sep. 9, 2018
The term frusta is sometimes applied to them.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 7 "Drama" to "Dublin" by Various
The second row of hoops is shrunk on forward of the trunnion hoops for a length of 38 inches to strengthen the gun, and the hoop portion forms three conical frustums.
From Scientific American Supplement, No. 561, October 2, 1886 by Various
Reinforces made the gun look like "three frustums of cones joined together, so as the lesser base of the former is always greater than the greatest of the succeeding one."
From Artillery Through the Ages A Short Illustrated History of Cannon, Emphasizing Types Used in America by Albert Manucy
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.
