Also found in: Dictionary, Thesaurus, Encyclopedia.
1. Biology Covered with short, fine whitish or grayish hairs or down; hoary.
2. Turning white or grayish.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
(1) Characterised by short, fine white or grey hair.
(2) Referring to the colour change in hair; going grey; greying.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.