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convex

adjective
🔊/ˈkɒnveks/
🔊/ˈkɑːnveks/
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  1. (of an outline or a surface外形或表面) curving out凸出的；凸面的
    • a convex lens/mirror凸透镜；凸镜
    • The surface is slightly convex.表面略凸。
    opposite concave
    Extra Examples
    • A convex lens is thicker at its centre than at its edges.凸透镜的中心比边缘厚。
    • A reflection in a convex mirror is smaller than the same reflection in a flat mirror.凸面镜中的反射小于平面镜中的相同反射。
    Topics Colours and Shapesc2
    Oxford Collocations DictionaryConvex is used with these nouns:
    • mirror
    See full entry
    Word Originlate 16th cent.: from Latin convexus ‘vaulted, arched’.