A`er*a"tion (#), n. [Cf. F. a'eration.]
Exposure to the free action of the air; airing; as, aeration of soil, of spawn, etc.
A change produced in the blood by exposure to the air in respiration; oxygenation of the blood in respiration; arterialization.
The act or preparation of charging with carbonic acid gas or with oxygen.
© Webster 1913.