Definition of villus
: a small slender often vascular process: such as
a
: one of the minute finger-shaped processes of the mucous membrane of the small intestine that serve in the absorption of nutriment
b
: one of the branching processes of the surface of the chorion of the developing embryo of most mammals that help to form the placenta
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Merriam-Webster unabridged
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Time Traveler for villus
The first known use of villus was in 1728
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