Definition of frustum in English:

frustum

nounPlural frustums, Plural frusta ˈfrʌstəmˈfrəstəm

Geometry

The portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes.
〔几何〕平截头体，截头锥体
Example sentencesExamples
- They only appear as frustums because they are being viewed at from an angle.
- An assessment task may ask students to devise a plan for determining the volume of the frustum of a pyramid (a task not previously considered in class).
- Depending mainly on the thicknesses of the members, the midplane splits one of the two members into two frusta, thus making a total of three frusta to analyse.
- There are formulas for frustums, but if you think about it, the calculations can be done by extending the frustum height to a vertex and then subtracting the ‘upper’ cone's values from the complete cone yielding the values for the frustum.

Origin

Mid 17th century: from Latin, 'piece cut off'.

Definition of frustum in US English:

frustum

nounˈfrəstəmˈfrəstəm

Geometry

The portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes.
〔几何〕平截头体，截头锥体
Example sentencesExamples
- There are formulas for frustums, but if you think about it, the calculations can be done by extending the frustum height to a vertex and then subtracting the ‘upper’ cone's values from the complete cone yielding the values for the frustum.
- An assessment task may ask students to devise a plan for determining the volume of the frustum of a pyramid (a task not previously considered in class).
- They only appear as frustums because they are being viewed at from an angle.
- Depending mainly on the thicknesses of the members, the midplane splits one of the two members into two frusta, thus making a total of three frusta to analyse.

Origin

Mid 17th century: from Latin, ‘piece cut off’.

词汇	frustum
释义	Definition of frustum in English: frustum nounPlural frustums, Plural frusta ˈfrʌstəmˈfrəstəm Geometry The portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes. 〔几何〕平截头体，截头锥体 Example sentencesExamples They only appear as frustums because they are being viewed at from an angle. An assessment task may ask students to devise a plan for determining the volume of the frustum of a pyramid (a task not previously considered in class). Depending mainly on the thicknesses of the members, the midplane splits one of the two members into two frusta, thus making a total of three frusta to analyse. There are formulas for frustums, but if you think about it, the calculations can be done by extending the frustum height to a vertex and then subtracting the ‘upper’ cone's values from the complete cone yielding the values for the frustum. Origin Mid 17th century: from Latin, 'piece cut off'. Definition of frustum in US English: frustum nounˈfrəstəmˈfrəstəm Geometry The portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes. 〔几何〕平截头体，截头锥体 Example sentencesExamples There are formulas for frustums, but if you think about it, the calculations can be done by extending the frustum height to a vertex and then subtracting the ‘upper’ cone's values from the complete cone yielding the values for the frustum. An assessment task may ask students to devise a plan for determining the volume of the frustum of a pyramid (a task not previously considered in class). They only appear as frustums because they are being viewed at from an angle. Depending mainly on the thicknesses of the members, the midplane splits one of the two members into two frusta, thus making a total of three frusta to analyse. Origin Mid 17th century: from Latin, ‘piece cut off’.
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