Liquefaction
Liquefaction (lik`we*fak"shun) , noun
[Latin liquefactio: compare French liquéfaction. See Liquefy.]
1.
The act or operation of making or becoming liquid; especially, the conversion of a solid into a liquid by the sole agency of heat.
2.
The state of being liquid.
3.
(Chemistry Physics) The act, process, or method, of reducing a gas or vapor to a liquid by means of cold or pressure; as, the liquefaction of oxygen or hydrogen.