< /ˌgæs trɒkˈni miˌaɪ, ˌgæs trəˈni-/. Anatomy.
- the largest muscle in the calf of the leg, the action of which extends the foot, raises the heel, and assists in bending the knee.
1670s, from Latinized form of Greek gastroknemia “calf of the leg,” from gaster “belly” (see gastric) + kneme “leg.” So called for its form. Related: Gastrocnemical.
n. pl. gas•troc•ne•mi•i (-mē-ī′)
- A muscle with its origin from the lateral and medial condyles of the femur, with insertion with the soleus muscle by the Achilles tendon into the lower half of the posterior surface of the calcaneus, with nerve supply from the tibial nerve, and whose action causes plantar flexion of the foot.