fourth cranial nerve fourth council of constantinople • fourth crusade · · · Info · Definitions · Synonyms · Characters · · fourth cranial nerve · · Text Common · · Latin · · Scripts 20 · · Length 4 · · Syllables Definitions · · · (noun) either of the two cranial nerves on either side that control the superior oblique muscles of the eyes. Synonyms: trochlear, trochlear nerve, trochlearis, fourth cranial nerve. · · Noun Definition 1 Synonyms · · · trochlear · · Synonym 1 trochlear nerve · · Synonym 2 trochlearis · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 h latin small letter h U+0068 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 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076