liquefaction
Concise Oxford English Dictionary © 2008 Oxford University Press:
liquefy /ˈlɪkwɪfʌɪ/ (also liquify)
▶verb (liquefies, liquefying, liquefied) make or become liquid.
– derivatives
liquefaction noun,
liquefactive adjective,
liquefiable adjective,
liquefier noun.
liquefaction noun,
liquefactive adjective,
liquefiable adjective,
liquefier noun.
– origin ME: from Fr. liquéfier from L. liquefacere ‘make liquid’, from liquere ‘be liquid’.
'liquefaction' also found in these Oxford entries:

