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单词 convanesce
释义 convanesce, v. Math.|kɒnvəˈnɛs|
[f. L. con- together + vānēscĕre to vanish.]
To disappear by the running together of two summits: said of the edge of a polyhedron.
1851E. P. Kirkman in Phil. Trans. CXLVII. 187 If AB convanesces by the union of its summits, P becomes P′, losing the faces A and B.
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