Villus \Vil"lus\, n.; pl. {Villi}. [L., shaggy hair, a tuft of
hair.]
1. (Anat.) One of the minute papillary processes on certain
vascular membranes; a villosity; as, villi cover the
lining of the small intestines of many animals and serve
to increase the absorbing surface.
[1913 Webster]
2. pl. (Bot.) Fine hairs on plants, resembling the pile of
velvet.
[1913 Webster]