‖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 ]