D defs.my
Entry 3 senses Webster, 1913

Liquefaction

/(lĭk`wē̇*făk"shŭn)/ · Liq·ue·fac·tion · IPA /lˌɪkwəfˈækʃən/
01 n. The act or operation of making or becoming liquid; especially, the conversion of a solid into a liquid by the sole agency of heat.
  1. 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. 2.
    The state of being liquid.
  3. 3.
    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.(Chem. Physics)