sinus sigmoideus sinus rectus • sinus transversus · · · Info · Definitions · Synonyms · Characters · · sinus sigmoideus · · Text Common · · Latin · · Scripts 16 · · Length 6 · · Syllables Definitions · · · (noun) an S-shaped dural sinus on the temporal and occipital bones. Synonyms: sigmoid sinus, sinus sigmoideus. · · Noun Definition 1 Synonyms · · · sigmoid sinus · · Synonym 1 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075