The process of exposing to air (so as to purify)

• Purpose of a faucet attachment
• Carbon dioxide treatment
• Soda-making process
• Function of a faucet insert
• The act of charging a liquid with a gas making it effervescent
• Exposure to air

Wiktionary Word definitions in Wiktionary
alt. The process by which air is circulated through or mixed with a substance such as soil or a liquid. n. The process by which air is circulated through or mixed with a substance such as soil or a liquid.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1570s, from French aération , from aérer (v.), from Latin aer (see air (n.1)). In some cases, from aerate .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Arterialization \Ar*te`ri*al*i*za"tion\, n. (Physiol.) The process of converting venous blood into arterial blood during its passage through the lungs, oxygen being absorbed and carbonic acid evolved; -- called also a["e]ration and hematosis .