soleus

A broad, flat muscle of the calf of the leg, situated under the gastrocnemius, whose action is to flex the foot downward.

A broad flat muscle of the calf of the leg, situated immediately in front of (deeper than) the gastrocnemius.

A broad, flat muscle that extends behind the gastrocnemius along the back of the calf

a broad flat muscle in the calf of the leg under the gastrocnemius muscle