- A hair on the head.
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 capillus
The Grete Herball, on the other hand, vouchsafes only the meagre information, Capillus veneris is an herbe so named!Herbals, Their Origin and Evolution
This strange action is called "capillary," from the resemblance the minute tubes bear to a hair, the Latin of which is capillus.
It is the same body even to the hair, “cum nec periturus sit capillus, ut ait Dominus: Capillus de capite vestro non peribit.”The Essence of Christianity