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opposable thumb
/ ə-pō′zə-bəl /
- A thumb that can be placed opposite the fingers of the same hand. Opposable thumbs allow the digits to grasp and handle objects and are characteristic of primates.
opposable thumb
- A thumb that can be used for grasping.
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Notes
Opposable thumbs are one of the distinguishing features of primates .
The opposable thumb of human beings allows us to use tools.
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