villus

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Related to arachnoid villus: choroid plexus, hydrocephalus

villus

1. Zoology anatomy any of the numerous finger-like projections of the mucous membrane lining the small intestine of many vertebrates
2. any similar membranous process, such as any of those in the mammalian placenta
3. Botany any of various hairlike outgrowths, as from the stem of a moss

villus

[′vil·əs]
(anatomy)
A fingerlike projection from the surface of a membrane.