la·nu·go /ləˈnu(ˌ)go, ˈnju-/
  胎髮; 柔毛
  la·nu·go /ləˈn(j)u(ˌ)go/ 名詞
  La·nu·go n.  Anat. The soft woolly hair which covers most parts of the mammal fetus, and in man is shed before or soon after birth.
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  lanugo
       n : the fine downy hair covering a human fetus; normally shed
           during the ninth month of gestation