liquefaction
From Longman Dictionary of Contemporary EnglishRelated topics: Physicsliquefactionliq‧ue‧fac‧tion /ˌlɪkwəˈfækʃən/ noun [uncountable] technicalHPLIQUID the act of making something a liquid or of becoming a liquidExamples from the Corpusliquefaction• That in turn requires extraction and electrolysis of 450 tons of water and liquefaction of the resulting 50 tons of hydrogen.• The country's political isolation and lack of indigenous oil has made coal liquefaction a major technology.• This corresponds to the liquefaction of the gas at this temperature.