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  1. opponent muscle

    • IPA[əˈpōnənt ˈməsəl]
    • n.
      any of several muscles enabling the thumb to be moved toward a finger of the same hand.
    • noun: opponent muscle, plural noun: opponent muscles

    • 更多解釋
    • n.
      any of several muscles enabling the thumb to be placed front to front against a finger of the ...

    Oxford Dictionary