WordReference Random House Unabridged Dictionary of American English © 2019
gas•troc•ne•mi•us  (gas′trok nēmē əs, gas′trə nē-),USA pronunciation n., pl.  -mi•i (-mē ī′).USA pronunciation [Anat.]
  1. Anatomythe largest muscle in the calf of the leg, the action of which extends the foot, raises the heel, and assists in bending the knee.
gas′troc•nemi•al, gas′troc•nemi•an, adj. 
  • Greek gastroknēm(ía) calf of the leg + Latin -ius noun, nominal suffix
  • Neo-Latin
  • 1670–80

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