英英辞典 - English Dictionary | CUERBO - クエルボ英語辞書

diameter

noun

  1. the length of a straight line passing through the center of a circle and connecting two points on the circumference

    円の中心点を通り、円周上の2点をつなぐ直線の長さ

  2. a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)

    円の中心と円周上の2点（または球の中心と球面上の2点）を結んでいる直線

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