1. any of the cylindrical filaments characteristically growing from the epidermis of a mammal; - Example: "there is a hair in my soup" [syn: hair, pilus]
2. hairlike structure especially on the surface of a cell or microorganism;
WordNet (r) 3.0 (2006):
pilus
n 1: any of the cylindrical filaments characteristically growing
from the epidermis of a mammal; "there is a hair in my
soup" [syn: hair, pilus]
2: hairlike structure especially on the surface of a cell or
microorganism