[ uhn-mahy-uh-luh-ney-tid ]
/ ʌnˈmaɪ ə ləˌneɪ tɪd /

adjective Anatomy.

pertaining to nerve fibers that are not covered with a myelin sheath.

Origin of unmyelinated

First recorded in 1915–20; un-1 + myelinated
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for unmyelinated

[ ŭn-mīə-lĭ-nā′tĭd ]


Lacking a myelin sheath. Used of a nerve fiber.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.