Hypertext Webster Gateway: "villus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
2. pl. (Bot.) Fine hairs on plants, resembling the pile of
velvet.
From WordNet (r) 1.7 (wn)
villus
n : a minute hairlike projection on mucous membrane
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