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ge·nio·glos·sus -'gläs-əs, -'glȯs- n, pl -glos·si -.ī a fan-shaped muscle that arises from the superior mental spine, inserts on the hyoid bone and into the tongue, and serves to advance and retract and also to depress the tongue
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ge·nio·glos·sus (je″ne-o-glosґəs) see under musculus.Medical dictionary. 2011.