- Air duct
- blower
- Process toner, vital to breathing apparatus
- Room fan
- A contrivance for effecting ventilation; especially, a
contrivance or machine for drawing off or expelling foul or stagnant
air from any place or apartment, or for introducing that which is fresh
and pure.
- Having a duct to the air bladder.
- Pertaining to the Physostomi.
- A pipe or duct used to convey hot air or steam.
- An order of fishes in which the air bladder is
provided with a duct, and the ventral fins, when present, are
abdominal. It includes the salmons, herrings, carps, catfishes, and
others.
- A vessel, cell, duct, or tube containing or conducting
air; as the air vessels of insects, birds, plants, etc.; the air vessel
of a pump, engine, etc. For the latter, see Air chamber. The air
vessels of insects are called tracheae, of plants spiral vessels.