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trochlear nerve

American  

noun

Anatomy.

  1. 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.

trochlear nerve British  
/ ˈtrɒklɪə /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of trochlear nerve

First recorded in 1885–90

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.