sphenoid sphenography • sphenoidal · · · Info · Definitions · Synonyms · Characters · · sphenoid · · Text Latin · · Script 8 · · Length 2 · · Syllables Definitions · · · (noun) butterfly-shaped bone at the base of the skull. Synonyms: sphenoid bone, os sphenoidale. · · Noun Definition 1 Synonyms · · · sphenoid bone · · Synonym 1 os sphenoidale · · Synonym 2 Characters · · 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 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073