Frustum meaning

frŭs'təm
The part of a solid, such as a cone or pyramid, between two parallel planes cutting the solid, especially the section between the base and a plane parallel to the base.
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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.
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The part of a solid figure contained between two parallel planes.
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A cone or pyramid whose tip has been truncated by a plane parallel to its base.
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A region of a sphere delimited by two parallel planes.
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Origin of frustum

Latin frūstum piece broken off

Sentence Examples

  • FRUSTUM (Latin for a "piece broken off"), a term in geometry for the part of a solid figure, such as a cone or pyramid, cut off by a plane parallel to the base, or lying between two parallel planes; and hence in architecture a name given to the drum of a column.

  • 19 the blast orifice B is set much lower, and the steam is discharged through a frustum of a cone set in the upper part of the smoke-box into the short chimney.

  • Hence the area of an ellipse whose axes are 2a and 2b is Trab; and the volume of an ellipsoid whose axes are 2a, 2b and 2c is t rabc. The area of a strip of an ellipse between two lines parallel to an axis, or the volume of the portion (frustum) of an ellipsoid between two planes parallel to a principal section, may be found in the same way.

  • The volume of a frustum of a cone, for instance, can be expressed in terms of certain magnitudes by a certain formula; but not only will there be some error in the measurement of these magnitudes, but there is not any material figure which is an exact cone.

  • This pulley has fixed to one side, and concentric with it, a short frustum of a hollow cone.

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Words near frustum in the Dictionary