Breather

Breath·er

Breather

n.
  1. One who breathes.
  2. That which puts one out of breath, as violent exercise. [Colloq.]
  3. a pause to catch one's breath, or for some other form of rest or refreshment; -- often used in the phrase to take a breather, i.e. to pause for refreshment. [Colloq.]
  4. a vent in a container to allow equalization of internal and external pressure.
  5. an air intake pipe to provide air to machinery or people submerged or otherwise sealed off from the outside.