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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - A white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers.

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Usage examples (31)
  • Specifically, these attacks damage cells called myelin which form the
  • The protective layer around nerves, known as the myelin sheath, becomes damaged.
  • Specifically, these attacks damage cells called myelin which form the "insulation" around nerve fibers.
  • In multiple sclerosis, the body's immune system attacks something called myelin, which sheathes the nerves.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.