the fine downy hair covering a human fetus; normally shed during the ninth month of gestation
lanugo详细解释
la.nu.go n.(名词)【复数】la.nu.gos A covering of fine, soft hair, as on a leaf, an insect, or a newborn child.细毛:,柔毛,例如覆盖在叶子、昆虫或婴儿的身上的细而软的毛 来源:Middle English [pith] 中古英语 [髓] from Latin l3nôgô [down] 源自 拉丁语 l3nôgô [下] from lana [wool] 源自 lana [羊毛]