Word of the Day
Everything After Z
Try Our Apps
Any of the funnel-shaped breaks in the myelin sheath of nerve fibers, each corresponding to strands of cytoplasm that separate the two membranes composing the myelin sheath.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.