ball of the thumb

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English[edit]

Noun[edit]

ball of the thumb ‎(plural balls of the thumb)

  1. (anatomy, informal) The fleshy portion, opposite the nail, of the first segment (first phalange) of the human thumb.
  2. (anatomy) The most fleshy portion of the palm of the human hand, located adjacent to the second joint of the thumb: the thenar eminence.