See c. muscle.
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coc·cyg·e·us käk-'sij-ē-əs n, pl coc·cyg·ei -jē-.ī a muscle arising from the ischium and sacrospinous ligament and inserted into the coccyx and sacrum called also coccygeus muscle, ischiococcygeus
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coc·cyg·e·us (kok-sijґe-əs) [L.] coccygeal.Medical dictionary. 2011.