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单词 frustum
释义

WordReference Random House Unabridged Dictionary of American English © 2024
frus•tum  (frustəm),USA pronunciation n., pl. -tums, -ta (-tə).USA pronunciation [Geom.]
  1. Mathematicsthe part of a conical solid left after cutting off a top portion with a plane parallel to the base.
  2. Mathematicsthe part of a solid, as a cone or pyramid, between two usually parallel cutting planes.
  • Latin: piece, bit; probably akin to Old Irish brúid (he) breaks, Old English brȳsan to crush
  • 1650–60

Collins Concise English Dictionary © HarperCollins Publishers::
frustum /ˈfrʌstəm/ n ( pl -tums, -ta / -tə/)
  1. 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
  2. the part of such a solid contained between two parallel planes intersecting the solid
Etymology: 17th Century: from Latin: piece; probably related to Old English brӯsan to crush, bruise
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