Phrase guide

myelin sheath

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

An envelope of myelin that surrounds nerve fibres.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, neuroanatomy, neurology, neuroscience, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a layer of myelin encasing (and insulating) the axons of medullated nerve fibers

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: medullary sheath

Antonyms: none provided

Broader terms: sheath, case

History

Etymology

No etymology was provided for this word.

Across languages

Translations

16 source translations are retained for this English entry.

  • Arabic: الغِمْدُ المَيَالِينيّ — envelope of myelin
  • Chinese Mandarin: 髓鞘 (suǐqiào) — envelope of myelin
  • Czech: myelinová pochva — envelope of myelin
  • Finnish: myeliinituppi — envelope of myelin
  • French: gaine de myéline — envelope of myelin
  • German: Myelinhülle — envelope of myelin
  • Irish: truaill mhiailineach — envelope of myelin
  • Italian: guaina mielinica — envelope of myelin
  • Japanese: 髄鞘 (zuishō) — envelope of myelin
  • Northern Kurdish: bergê maylînî — envelope of myelin
  • Portuguese: bainha de mielina — envelope of myelin
  • Romanian: teacă de mielină — envelope of myelin
  • Russian: миели́новая оболо́чка (mijelínovaja obolóčka) — envelope of myelin
  • Spanish: vaina de mielina — envelope of myelin
  • Spanish: capa de mielina — envelope of myelin
  • Swedish: myelinskida — envelope of myelin