Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

myelin

play
noun my·e·lin \ˈmī-ə-lən\

Definition of myelin

  1. :  a soft white somewhat fatty material that forms a thick layer around the axons of some neurons

myelinic

play \ˌmī-ə-ˈli-nik\ adjective


Origin and Etymology of myelin

International Scientific Vocabulary


First Known Use: 1873


Medical Dictionary

myelin

play
noun my·e·lin \ˈmī-ə-lən\

Medical Definition of myelin

  1. :  a soft white material of lipid and protein that is secreted by oligodendrocytes and Schwann cells and forms a thick sheath about axons—see myelin sheath

myelinic

\ˌmī-ə-ˈlin-ik\play adjective



Learn More about myelin


Seen and Heard

What made you want to look up myelin? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a talk on a religious or moral theme

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption torrent megillah rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ