trochlear nerve

UK: /ˈtrɒklɪə/

WordReference Random House Unabridged Dictionary of American English © 2026

troch′lear nerve′, [Anat.]

1. Anatomy either one of the fourth pair of cranial nerves, consisting of motor fibers that innervate the superior oblique muscle of the upper part of the eyeball.

• 1885–90

Collins Concise English Dictionary © HarperCollins Publishers::

trochlear nerve / ˈtrɒklɪə/ noun

1. either one of the fourth pair of cranial nerves, which supply the superior oblique muscle of the eye