Home/medullationmedullation/med-l-ey-shuhn, mej-uh-ley-/US // ˌmɛd lˈeɪ ʃən, ˌmɛdʒ əˈleɪ- //髓质化,髓化,髓瘤,髓质膨胀Definitionsn.名词 noun1 Biology.: the formation of a medullary sheath about a nerve fiber.Level 3Browse all words →