aërification

from The Century Dictionary.

• noun The act of combining anything with air; the state of being filled with air.
• noun The act of becoming air, or of changing into an aëriform state, as substances which are converted from a liquid or solid form into gas or an elastic vapor; the state of being aëriform.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of combining air with another substance, or the state of being filled with air.
• noun The act of becoming aërified, or of changing from a solid or liquid form into an aëriform state; the state of being aëriform.