myelin sheath

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noun Anatomy.

a wrapping of myelin around certain nerve axons, serving as an electrical insulator that speeds nerve impulses to muscles and other effectors.

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Origin of myelin sheath

First recorded in 1895–1900

Words nearby myelin sheath

myelin, myelinated, myelinated fiber, myelination, myelinolysis, myelin sheath, myelitis, myelo-, myeloblast, myeloblastemia, myeloblastic leukemia

How to use myelin sheath in a sentence

De la Renta did design some stuff for Kennedy too—notably, one perfect belted sheath in crisp white linen.
How Oscar de la Renta Created First Lady Fashion|Raquel Laneri|October 21, 2014|DAILY BEAST
Finally, she slithered into a finished dress: the ultimate chic sheath, a collarless long-sleeved navy blue garment.
Tilda Swinton and Oliver Saillard Perform the Creation of Fashion in ‘Eternity Dress’|Sarah Moroz|November 21, 2013|DAILY BEAST
In MS, the amount and quality of myelin is abnormal, replaced by “sclerotic” plaques, the hallmark of the disease.
Can NASCAR Driver Trevor Bayne Race Safely With Multiple Sclerosis?|Kent Sepkowitz|November 13, 2013|DAILY BEAST
This loss of usable myelin results in poor nerve-to-nerve coordination, resulting is a slightly haywire main dashboard.
Can NASCAR Driver Trevor Bayne Race Safely With Multiple Sclerosis?|Kent Sepkowitz|November 13, 2013|DAILY BEAST

And she has been spotted wearing nothing but the most discrete, tailored sheath dresses.
Petraeus Affair Stereotypes: The General, The Flirt And The Harlot|Robin Givhan|November 15, 2012|DAILY BEAST
The Datto complaisantly allowed me to draw it from the sheath and pass it round to my friends.
The Philippine Islands|John Foreman
Whipping the long, keen blade from its sheath, Marius bore down upon the rash meddler.
St. Martin's Summer|Rafael Sabatini
Tail truncated, spine on the side of the tail very distinct, imbedded in a sheath.
Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]|Phillip Parker King
He saw a large sheath-knife, and secured that in his own belt; then he took a mouthful of wine, and went to his post.
The Chequers|James Runciman
He was trying to 286 work the knife from its sheath before I could force him backward or break his neck.
A Virginia Scout|Hugh Pendexter

Medical definitions for myelin sheath

myelin sheath

The insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells.medullary sheath