any of the cylindrical filaments characteristically growing from the epidermis of a mammal
同义词：hair
hairlike structure especially on the surface of a cell or microorganism
pilus详细解释
pi.lus n.（名词）【复数】pi.li[-lo.] A hair or hairlike structure, especially on the surface of a cell or microorganism.纤毛，菌毛：毛发或毛发状结构，尤指在细胞或微生物表面 来源：Latin 拉丁语
