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  1. of or relating to the trigeminal nerve.
  1. Also called trigeminal nerve. either one of the fifth pair of cranial nerves, consisting of motor fibers that innervate the muscles of mastication, and of sensory fibers that conduct impulses from the head and face to the brain.

Origin of trigeminal

1820–30; < New Latin trigemin(us) (Latin: triple, equivalent to tri- tri- + geminus twin, double) + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for trigeminal nerve

trigeminal nerve

  1. either one of the fifth pair of cranial nerves, which supply the muscles of the mandible and maxilla. Their ophthalmic branches supply the area around the orbit of the eye, the nasal cavity, and the forehead


  1. anatomy of or relating to the trigeminal nerve

Word Origin

C19: from Latin trigeminus triplet, from tri- + geminus twin
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

Word Origin and History for trigeminal nerve



1830, from Latin trigeminus "born in threes;" see tri- + geminate.

Online Etymology Dictionary, © 2010 Douglas Harper

trigeminal nerve in Medicine

trigeminal nerve

  1. The chief sensory nerve of the face and the motor nerve of the muscles of chewing. The nuclei of the nerve are in the mesencephalon and in the pons and extend down into the cervical portion of the spinal cord. The nerve emerges by two sensory and motor roots from the pons and enters a cavity of the dura mater at the temporal bone, where its sensory root expands to form the trigeminal ganglion that forms three branches that are designated ophthalmic, maxillary, and mandibular.fifth cranial nerve trigeminus


([object Object])
  1. Of or relating to the trigeminal nerves.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

trigeminal nerve in Science

trigeminal nerve

  1. Either of the fifth pair of cranial nerves, having sensory and motor functions in the face, teeth, mouth, and nasal cavity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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