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单词 tetrastigm
释义 tetrastigm Geom.|ˈtɛtrəstɪg(ə)m|
[f. Gr. τετρα- tetra- + στίγµα prick, mark, point.]
The complete figure composed of four points in a plane and their six connecting straight lines; commonly called complete quadrangle.
1863[see tetragram 2].
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