[ vĕl′əs ]
The fine hair present on the body before puberty.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for vellus
From the Italian word velluto, signifying velvet, which comes from vellus, hair or fleece.