convex

adj. 凸面的；凸圆的

n. 凸面体；凸状

中文词源

convex 凸透镜

con-, 强调。-vex, 同-vect, 携带，移动，词源同vector, vehicle. 即在拱顶汇集的，形成凸透镜形状的。

convex: convex: [16] Convex was borrowed from Latin convexus, mainly an architectural term meaning ‘arched, vaulted’. The element -vexus probably came from vehere ‘carry’ (source of English vehicle), the notion being that vaults are ‘carried together’ (Latin com- ‘together’) to meet at a point at the centre of a roof, although some have speculated that it is related to Latin vārus ‘bent, knock-kneed’ (source of English prevaricate).
=> vehicle, vex
convex (adj.): 1570s, from Middle French convexe, from Latin convexus "vaulted, arched," past participle of convehere "to bring together," from com- "together," or "thoroughly" (see com-) + vehere "to bring" (see vehicle). Possibly from the idea of vaults carried together to meet at the point of a roof. Related: Convexity. Convex lens is from 1822.

1. I wouldn't say your stomach was big — it's just slightly convex.: 我不会说你的肚子大——它只是有点凸出.

2. Its convex border should project far into the right lower lung field.: 其凸出缘应深深地突入右下肺野内.

4. Alternative characterization of concave and convex functions which is sometimes useful.: 对于凹函数和凸函数还有一个替补的表征,有时它是有用的.

5. In adults its contour may be straight, slightly concave or slightly convex.: 成人肺其形状可以是直的, 轻微凹下或轻度突出.