os hyoideum os hamatum • os ischii · · · Info · Definitions · Synonyms · Characters · · os hyoideum · · Text Common · · Latin · · Scripts 11 · · Length 5 · · Syllables Definitions · · · (noun) a U-shaped bone at the base of the tongue that supports the tongue muscles. Synonyms: hyoid, hyoid bone, os hyoideum. · · Noun Definition 1 Synonyms · · · hyoid · · Synonym 1 hyoid bone · · Synonym 2 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075 y latin small letter y U+0079