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frustum n. 截头体 截头体 frustum n 1: a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed Frustum \Frus"tum\, n.; pl. L. {Frusta}, E. {Frustums}. [L.
fruslum piece, bit.] [1913 Webster] 1. (Geom.) The part of a solid next the base, formed by cutting off the, top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may be either parallel or inclined to each other. [1913 Webster] 2. (Arch.) One of the drums of the shaft of a column. [1913 Webster]
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