trochlear trochlea • trochlear nerve · · · Info · Definitions · Synonyms · Characters · · trochlear · · Text Latin · · Script 9 · · Length 2 · · Syllables Definitions · · · (noun) either of the two cranial nerves on either side that control the superior oblique muscles of the eyes. Synonyms: trochlear nerve, trochlearis, fourth cranial nerve. · · Noun Definition 1 Synonyms · · · trochlear nerve · · Synonym 1 trochlearis · · Synonym 2 fourth cranial nerve · · Synonym 3 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074