sigmoid vein sigmoid sinus • sigmoidal · · · Info · Definitions · Synonyms · Characters · · sigmoid vein · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) tributaries of the inferior mesenteric vein; drains the sigmoid colon. Synonyms: sigmoid vein, vena sigmoideus. · · Noun Definition 1 Synonyms · · · vena sigmoideus · · 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 v latin small letter v U+0076