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.
实用例句
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.来自《简明英汉词典》
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.来自辞典例句
3. A convex lens is used to concentrate rays of light.
凸透镜用于聚集光线.来自辞典例句
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.来自辞典例句
5. In adults its contour may be straight, slightly concave or slightly convex.
