villus

https://doi.org/10.1351/goldbook.11371
  1. Projection from the surface, typically of a mucous membrane.
  2. Elongated projection of the dermis into an epidermal space.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 820 [Terms] [Paper]