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1. Oxford Dictionary

   sexual dimorphism

   • n.
     distinct difference in size or appearance between the sexes of an animal in addition to the sexual organs themselves.

   • noun: sexual dimorphism

2. • 更多解釋

   sexual dimorphism

   • IPA[ˈsekSH(əw)əl dīˈmôrfizəm]

   • n.
     distinct difference in size or appearance between the sexes of an animal in addition to ...

   Oxford American Dictionary