Villus

[Sarah]

One of the minute papillary processes on certain vascularmembranes; a villosity; as, villi cover the lining of the smallintestines of many animals and serve to increase the absorbingsurface.

[Zipporah Schumaker]

one of many very small finger-like parts that are found on the inside surface of the small intestine and help food to be absorbed

[PussyCat]

Any of the fingerlike or threadlike projections from the surface of certain membranous structures, typically serving to increase surface area and facilitate the passage of fluid or nutrients.