| 单词 | concavo-convex | 
| 释义 | con·ca·vo-con·vex    (kŏn-kā′vō-kŏn-vĕks)adj. 1.  Concave on one side and convex on the other. 2.  Having greater curvature on the concave side than on the convex side. Used of a lens.  | 
	
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