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  1. Oxford American Dictionary

    umbo

    • IPA[ˈəmbō]

    美式

    • n.
      the central boss of a shield.；a rounded knob or protuberance.

    • noun: umbo, plural noun: umbones

    • 釋義

    名詞

    • 1. historical the central boss of a shield.
    • 2. a rounded knob or protuberance.
    • ▪ the highest point of each valve of a bivalve shell.
    • ▪ a central swelling on the cap of a mushroom or toadstool.
    • 更多解釋

    umbo

    • IPA[ˈʌmbəʊ]

    英式

    • n.
      the central boss of a shield.

    Oxford Dictionary