单词	opposable
释义	opposable /əˈpəʊzəb(ə)l / adjective Zoology (Of the thumb of a primate) capable of facing and touching the other digits on the same hand.Digits 1 and 2 on the forefeet are opposable to digits 3-5, and the hindfoot has a well-developed hallux.... The first 2 digits of their forefeet are opposable to the other three in the more arboreal species. A panda with a fully opposable thumb that is lacking in its nearest relatives is hard to explain via evolution.
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