of or relating to the trigeminal nerve.


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.

Nearby words

  1. trig.,
  2. triga,
  3. trigamous,
  4. trigamy,
  5. trigastric,
  6. trigeminal cavity,
  7. trigeminal ganglion,
  8. trigeminal nerve,
  9. trigeminal neuralgia,
  10. trigeminal pulse

Origin of trigeminal

1820–30; < New Latin trigemin(us) (Latin: triple, equivalent to tri- tri- + geminus twin, double) + -al1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for trigeminal

British Dictionary definitions for trigeminal



anatomy of or relating to the trigeminal nerve

Word Origin for trigeminal

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



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

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for trigeminal




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.