Myelin

Definition: Myelin

Myelin

Noun

1. A white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers.

Etymology: Myelin \My"e*lin\, noun. [Greek expression marrow.]. (Websters 1913)

Specialty Definition: Myelin

Domain	Definition
Health	The fatty substance that covers and protects nerves. (references)
Source: compiled by the editor from various references; see credits.

Top

Specialty Definition: Myelin

(From Wikipedia, the free Encyclopedia)

Myelin is an electrically insulating fatty layer that surrounds the axons of many neurons, especially those in the peripheral nervous system. It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while oligodendrocytes supply it to those of the central nervous system.

The main consequence of a myelin layer (or sheath) is an increase in the speed at which impulses propagate along the myelinated fiber. Along unmyelinated fibers impulses move continuously as waves, but in myelinated fibers they hop (or "propagate by saltation"). When a fiber is severed, the myelin sheath provides a track along which regrowth can occur. Unmyelinated fibers do not regenerate.

Demyelination is a loss of myelin and is the root cause of symptoms experienced by patients with diseases such as multiple sclerosis and transverse myelitis. When an axon's myelin degrades due to these diseases, conduction can be impaired or lost.

Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Myelin."

Top

Synonyms: Myelin

Synonyms: medulla (n), myeline (n). (additional references)

Top

Crosswords: Myelin

English words defined with "myelin": demyelination, disseminated multiple sclerosis, disseminated sclerosis ♦ medullary sheath, medullated, medullated nerve fiber, MS, multiple sclerosis, myelin sheath, myelinated, myelinated nerve fiber, myelinisation, myelinization, Myeloidin ♦ nodes of Ranvier ♦ oligodendria, oligodendroglia ♦ Ranvier's nodes ♦ Schwann cell, substantia alba ♦ white matter. (references)

Specialty definitions using "myelin": Autoimmune Diseases of the Nervous System ♦ Charcot-Marie-Tooth disease ♦ Demyelinating Autoimmune Diseases, CNS, Demyelinating Diseases ♦ Hereditary Central Nervous System Demyelinating Diseases, hereditary motor and sensory neuropathy ♦ Mice, Quaking, Myelin Proteins ♦ Nerve Fibers, Myelinated ♦ obligation venant � échéance, oligodendroglial, oligodendroglial cell ♦ peroneal muscular atrophy, Polyradiculoneuropathy ♦ Schwann Cells, Sensory loss. (references)

Top

Commercial Usage: Myelin

Domain	Title
Books	A Multidisciplinary Approach to Myelin Diseases (NATO Asi Series A, Life Sciences, Vol 142) (reference) Disorders of Myelin in the Central and Peripheral Nervous Systems (reference) Enzyme and protein changes in myelin breakdown and multiple sclerosis: a review of some recent histochemical and biochemical studies (reference) Magnetic Resonance of Myelin, Myelination, and Myelin Disorders (reference) Myelin (reference) (more book examples)
Source: compiled by the editor from various references; see credits.

Top

Photo Album: Myelin

Thumbnail	Description & Credit
	This image shows severe demyelinization of the posterior columns of the spinal cord due to long-standing syphilis disease. This can result in a staggering, wide-based gait, postural instability, pain and paresthesias; Myelin stain; magnification 450X. Credit: CDC.
Source: pictures compiled by the editor from various references; see picture credits.

Top

Non-Fiction Usage: Myelin

Subject	Topic	Quote
Health		In the PNS, Schwann cells generate myelin. (references)
		Findings suggest that T cells are implicated in myelin destruction. (references)
		The myelin insulating covering of axons gives the whitish appearance. (references)
Source: compiled by the editor from ICON Group International, Inc.; see credits.

Top

Usage Frequency: Myelin

"Myelin" is generally used as a noun (singular) -- approximately 100.00% of the time. "Myelin" is used about 16 times out of a sample of 100 million words spoken or written in English. Its rank is based on over 700,000 words used in the English language. Some parts-of-speech are not covered due to the samples used by the British National Corpus. (note: percents less than one-hundredth of one percent have been omitted)

Parts of Speech	Percent	Usage per 100 Million Words	Rank in English
Noun (singular)	100%	16	87,710

Source: compiled by the editor from several corpora; see credits.

Top

Expressions: Myelin

Expressions using "myelin": Myelin Basic Proteins ♦ Myelin P0 Protein ♦ Myelin P2 Protein ♦ Myelin Proteins ♦ Myelin Proteolipid Protein ♦ Myelin Sheath. Additional references.
Hyphenated Usage
	Beginning with "myelin": Myelin-Associated Glycoprotein.
Source: compiled by the editor from various references; see credits.

Top

Frequency of Internet Keywords: Myelin

The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com.

Expression	Frequency per Day
myelin	60
myelin sheath	33
myelin project	27
myelin basic protein	7
disorder myelin	3
disease myelin	2
cmt damaged mineral myelin repair sheath that vitamin	2
Source: compiled by the editor from various references; see credits.

Top

Modern Translation: Myelin

Language		Translations for "myelin"; alternative meanings/domain in parentheses.
Danish		myelinskede, myelin. (various references)

Dutch		myeline. (various references)

Finnish		myeliini. (various references)

French		myéline. (various references)

German		Myelin. (various references)

Greek		μυελίνη. (various references)

Italian		mielina (myeline). (various references)

Pig Latin		yelinmay

Spanish		mielina. (various references)
Source: compiled by the editor from various translation references.

Top

Derivations & Misspellings: Myelin

Derivations
	Words beginning with "myelin": myelinated, myeline, myelines, myelinic, myelins. (additional references)
	Words containing "myelin": demyelinating, demyelination, demyelinations, nonmyelinated, unmyelinated. (additional references)
Misspellings
	"Myelin" is suggested in spellcheckers for the following: Gmelin, Lyalin, Maylin, Mceoin, mekin, melan, melen, melian, Melih, melina, Melnik, Melyn, Memlinc, Meyrin, Mideplan, Mielan, Mieli, Moyallon, Moylinn, Muehlen, myain, myel, Mylia, Myllin, Myln, Neylan, Neylin, Yeelen. (additional references)
Source: compiled by the editor, based on several corpora (additional references).

Top

Rhyming with "Myelin"

# of Phoneme Matches	Pronunciation	Word(s) rhyming with "myelin" (pronounced mī"uli'n)
4	-u l i' n	mandolin.
3	-l i' n	Caplin, Carlin, Catlin, Codlin, Colin, Franklin, Goblin, maudlin, Merlin, Paulin, poplin.
Source: compiled by the editor (additional references); see credits.

Top

Anagrams: Myelin

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "e-i-l-m-n-y"
	-1 letter: limen, limey, liney, meiny.
	-2 letters: elmy, inly, lien, lime, limn, limy, line, liny, mien, mile, mine, ylem.
	-3 letters: elm, lei, ley, lie, lin, lye, mel, men, mil, nil, nim, yen, yin.
	-4 letters: el, em, en, in, li, me, mi, my, ne, ye.
	Words containing the letters "e-i-l-m-n-y"
	+1 letter: myeline, myelins.
	+2 letters: hymenial, hymnlike, maidenly, medianly, menially, minutely, mycelian, myelines, myelinic, mylonite, untimely.
	+3 letters: amplidyne, animately, eminently, employing, geminally, hemolysin, immensely, liveryman, liverymen, meaningly, meltingly, mentality, millenary, millinery, minelayer, mylonites, noisomely, polyamine, seemingly, seminally, solemnify, solemnity, teemingly, winsomely.
	+4 letters: alimentary, amplidynes, anemically, animatedly, becomingly, femininely, germinally, hemolysins, hemolyzing, immanently, imminently, impotently, impudently, inclemency, informedly, inhumanely, intimately, lymphokine, manifestly, menacingly, millihenry, mindlessly, minelayers, mineralogy, minstrelsy, miscellany, misrelying, mistakenly, monetarily, myelinated, polyamines, semicolony, temptingly, terminably, terminally.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.