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  1. concave

    • IPA[känˈkāv]

    美式

    • adj.
      having an outline or surface that curves inward like the interior of a circle or sphere
    • 釋義
    • 相關詞
    • adj.
      形容詞
    • 1. having an outline or surface that curves inward like the interior of a circle or sphere:

      concave lenses

    • adj. (of a lens) convex on one side and concave on the other and thickest in the centre.

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    • adj. another term for biconcave

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    • adj. (of a lens) convex on one side and concave on the other and thickest in the center.

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    • adj. (of a lens) with one surface plane and the opposite one concave.

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    • adj. another term for biconcave

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    • 更多解釋
    • IPA[ˈkɒnkeɪv]

    英式

    • adj.
      having an outline or surface that curves inwards like the interior of a circle or sphere:
    • concave lenses

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  2. 知識+