GASTROCNEMIUS

[gas.troc.ne.mi.us] n, pl -mii [NL, fr. Gk gastrokneme calf of the leg, fr. gastr- + kneme shank--more at ham] (1676): the largest and most superficial muscle of the calf of the leg arising by two heads from the condyles of the femur and attaching to a tendon that becomes part of the Achilles tendon