vellus hair

US /ˈvel.əs her/
UK /ˈvel.əs her/
"vellus hair" picture
1.

short, fine, light-colored, and barely noticeable hair that develops on most of a person's body during childhood

:
Unlike terminal hair, vellus hair is very fine and lacks pigment.
During puberty, vellus hair can transform into terminal hair in certain areas.