villus
/ˈvɪləs/noun
(pl. villi /ˈvɪlaɪ/)
1- Anatomy any of numerous minute elongated projections set closely together on a surface, typically increasing its surface area for the absorption of substances, in particular【剖】绒毛, 尤指：
1.1
- a finger-like projection of the lining of the small intestine小肠绒毛。
1.2
- a fold of the chorion绒毛膜。
词源
early 18th cent.: from Latin， literally 'shaggy hair'.