gastrocnemius(redirected from gastrocnemii)
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superficial muscle of posterior (plantar flexor) compartment of leg; origin, by two heads (lateral and medial) from the lateral and medial condyles of the femur; insertion, with soleus by tendo calcaneus into lower half of posterior surface of calcaneus; action, plantar flexion of foot; nerve supply, tibial.
n. pl. gastrocne·mii (-mē-ī′)
The largest, most prominent muscle of the calf of the leg, the action of which extends the foot and bends the knee.