fourth cranial nerve /ˈfo(ə)rθ, ˈfɔ(ə)rθ-/ 名詞
第四對顱神經,滑車神經,第四腦神經
fourth cranial nerve
n : either of the two cranial nerves on either side that control
the superior oblique muscles of the eyes [syn: trochlear,
trochlear nerve, trochlearis]