soleus(redirected from solei)
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muscle of superficial posterior (plantar flexor) compartment of leg; origin, posterior surface of head and upper third of the shaft of the fibula, oblique line and middle third of medial margin of the tibia, and a tendinous arch passing between tibia and fibula over the popliteal vessels; insertion, with gastrocnemius by tendo calcaneus (achillis) into the tuberosity of calcaneus; action, plantar flexion of foot; nerve supply, tibial.
Synonym(s): musculus soleus [TA]
n. pl. so·lei (-lē-ī′)
A broad, flat muscle of the calf of the leg, situated under the gastrocnemius, whose action is to flex the foot downward.