thumb (redirected from Opposable thumbs)

thumb (thum) the radial or first digit of the hand.

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tennis thumb  tendinitis of the tendon of the long flexor muscle of the thumb, with calcification.

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thumb (thm)

n.

The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits.

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thumb

the radial or first digit of the hand; it has only two phalanges and is apposable to the four fingers of the hand. It is present in primates and a few other arborial (scansorial) animals.

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thumb See Bowler's thumb, Gamekeeper's thumb, Harp player's thumb, Hitch-hiker's thumb, Skier's thumb, Trigger thumb.