| 单词 | frustum |
| 释义 | frustum /frus"teuhm/, n. , pl. frustums, frusta /-teuh/. Geom. 1. the part of a conical solid left after cutting off a top portion with a plane parallel to the base. 2. the part of a solid, as a cone or pyramid, between two usually parallel cutting planes. [1650-60; < L: piece, bit; prob. akin to OIr brúid (he) breaks, OE brysan to crush] |
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