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词汇 medullary sheath
释义

Definition of medullary sheath in English:

medullary sheath

noun
  • 1Botany, (in some higher plants) a layer of cells surrounding the pith of the stem.

  • 2Histology and Physiology= myelin sheath (now rare).

Origin

Early 19th century; earliest use found in Patrick Keith (1769–1840).

Definition of medullary sheath in US English:

medullary sheath

noun
  • 1Botany, (in some higher plants) a layer of cells surrounding the pith of the stem.

  • 2Histology and Physiology= myelin sheath (now rare).

Origin

Early 19th century; earliest use found in Patrick Keith (1769–1840).

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