lanugo

noun, plural la·nu·gos. Biology.

1. a coat of delicate, downy hairs, especially that with which the human fetus or a newborn infant is covered.

noun plural -gos

1. a layer of fine hairs, esp the covering of the human fetus before birth

n. pl. la•nu•gos

1. The fine, soft hair that grows on a fetus and is present on a newborn.lanugo hair

1. A covering of fine, soft hair or hairlike structures, as on a leaf, insect, or human fetus.