1. pilus

noun. any of the cylindrical filaments characteristically growing from the epidermis of a mammal.


  • mammal
  • mammalian
  • ingrown hair
  • filum
  • hair

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2. pilus

noun. hairlike structure especially on the surface of a cell or microorganism.


  • micro-organism
  • hair

Sentences with pilus

1. Noun, singular or mass
The bacterium that extends the sex pilus then copies a plasmid and passes the copy through the tube into the other bacterium.

2. Coordinating conjunction
The word *pilus* (plural is pili) comes from the Latin word for hair.