frustumnoun [ C ]
uk/ˈfrʌs.təm/us/ˈfrʌs.təm/frusta /ˈfrʌs.tə/frustumsspecialized mathematics the part of a solid shape such as a cone that is between the base of the shape and a parallel plane through the shape or between two parallel planes through the shape
Thesaurus: synonyms and related words
Geometry: parts of geometrical shapes
- angle
- circumference
- corresponding sides
- cosine
- crosswise
- diameter
- hemisphere
- hypotenuse
- line
- line segment
- node
- perimeter
- plane
- quadrant
- radius
- section
- side
- sin 1
- vertex
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Examples from literature
- 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."
- The form of the stand is the frustum of a hexagonal pyramid reversed, about six or eight inches in diameter.
- The plummet, shaped like the frustum of a cone, and weighing thirty pounds, was thrown out from the side in the line of the vessel's drift.