Definition of myelin in English:

myelin

Line breaks: mye¦lin
Pronunciation: /ˈmʌɪəlɪn
 
/

noun

[mass noun] Anatomy & Physiology
A mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibres, which increases the speed at which impulses are conducted.
More example sentences
  • It turns out that the bacterium that causes leprosy directly damages a protective sheathing, made of the protein myelin, around many nerve cells.
  • They then manipulated them in the laboratory to turn them into specialised cells that form myelin, the insulating layer than surrounds nerve fibres.
  • For example, multiple sclerosis involves the progressive destruction of the myelin that insulates neural axons.

Origin

late 19th century: from Greek muelos 'marrow' + -in1.

Derivatives

myelinated

adjective
More example sentences
  • Their content of myelinated nerve fibers indicates their origin as branches of the pelvic colonic innervation.
  • It also preserved many of the myelinated nerve fibers in treated animals, compared to untreated rats and those that did not receive the triple combination, the researchers found.
  • The incompletely myelinated frontal lobes of children only gradually join the grid of electrical activity that operates the brain.

myelination

Pronunciation: /-ˈneɪʃ(ə)n/
noun
More example sentences
  • Other innovations in this group of animals include an adaptive immune system similar to that of humans, a closed and pressurized circulatory system, and myelination of the nervous system.
  • Hence, neuronal circuitry and myelination are disrupted.
  • Next are areas related to memory, then to spatial orientation and to comprehension of language and then we see myelination in language areas.

More definitions of myelin

Definition of myelin in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day crowdsource
Pronunciation: ˈkroudˌsôrs
verb
obtain (information) by enlisting help of many people…