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medlar
medley
medley relay
Medline
medroxyprogesterone acetate
medulla
medulla oblongata
medullary ray
medullary sheath
medullated
medulloblastoma
Medusa
medusa
meed
meek
meerkat
meerschaum
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medullary sheath

med·ul·lar·y sheath (plural med·ul·lar·y sheaths)


noun 
Definition:
 
anatomy 
Same as  myelin sheath


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