n, pl  tib*i*a*les   :  either of two muscles of the calf of the leg:  a  :  a muscle arising chiefly from the lateral condyle and part of the shaft of the tibia, inserting by a long tendon into the first cuneiform and first metatarsal bones, and acting to flex the foot dorsally and to invert it - called also tibialis anterior , ibialis anticus   b  :  a deeply situated muscle that arises from the tibia and fibula, interosseous membrane, and intermuscular septa, that is inserted by a tendon passing under the medial malleolus into the navicular and first cuneiform bones, and that flexes the foot in the direction of the sole and tends to invert it - called also tibialis posterior , ibialis posticus  .
 
 
 
Similar sounding terms:  tu·bu·lus 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2004.