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单词 hemipyramid
释义 hemiˈpyramid Cryst.
[hemi-.]
A figure consisting of two pairs of parallel faces intersecting all three axes in the monosymmetric system (in which four such pairs constitute a pyramid). Hence hemipyˈramidal a., of or pertaining to a hemipyramid.
1854Mayne Expos. Lex., Hemipyramidal..Hemirhombohedral.
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