myelin sheath
Americannoun
Etymology
Origin of myelin sheath
First recorded in 1895–1900
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
MS is a disease of the brain and central nervous system, in which the immune system mistakenly attacks the fatty myelin sheath that normally protects the nerves, like insulation around electric wires.
From BBC • May 29, 2026
These metabolites support the growth and maturation of oligodendrocytes, which in turn helps rebuild the myelin sheath.
From Science Daily • Apr. 15, 2026
Their findings show that the immune system begins attacking the brain's protective myelin sheath -- the fatty covering that insulates nerve fibers -- much earlier than scientists once believed.
From Science Daily • Oct. 21, 2025
When the organoids were exposed to ESI1, the treatment extended the myelin sheath of myelinating cells, the study reports.
From Science Daily • May 2, 2024
"There may be a way to intervene so that you can increase the myelin sheath," he said.
From Science Daily • Jan. 14, 2024
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
