tentorial sinus tentorial • tentorium · · · Info · Definitions · Synonyms · Characters · · tentorial sinus · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) an unpaired sinus of the dura mater. Synonyms: straight sinus, tentorial sinus, sinus rectus. · · Noun Definition 1 Synonyms · · · straight sinus · · Synonym 1 sinus rectus · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075