pilus

nouns

any of the cylindrical filaments characteristically growing from the epidermis of a mammal
"there is a hair in my soup"
hair, pilus
is derived from
pilar
hairlike structure especially on the surface of a cell or microorganism
pilus
is a part of
any organism of microscopic size
micro-organism, microorganism
is a type of (narrower)
a filamentous projection or process on an organism
hair