Bible Dictionaries
Myelin

Webster's Dictionary

(1):

(n.) One of a group of phosphorized principles occurring in nerve tissue, both in the brain and nerve fibers.

(2):

(n.) A soft white substance constituting the medullary sheats of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, albumin, and some fat.

Bibliography Information
Webster, Noah. Entry for 'Myelin'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​m/myelin.html. 1828.