baby hair

noun3

1. •
   The hair of a baby.
2. •
   Any immature or fine strand of hair, or (uncountably) a collection of such hairs. (Compare baby tooth, baby fat.)

   • You shed your hair, too. Old hairs fall out nearly every day, and new baby hairs grow in their places . — 1919
3. •
   (dialect) A fine, wispy strand of hair at the edge of a person's (usually a woman's) hairline.

   • Medium size cornrows going back with a curl at the end of each braid. A silky, smooth, hairline, highlighted with soft black baby hairs. — 2003