n. [ L. calefactio: cf. F. caléfaction. ] 1. The act of warming or heating; the production of heat in a body by the action of fire, or by communication of heat from other bodies. [ 1913 Webster ]
n. [ Cf. F. raréfaction. See Rarefy. ] The act or process of rarefying; the state of being rarefied; -- opposed to condensation; as, the rarefaction of air. [ 1913 Webster ]
English-Thai: HOPE Dictionary [with local updates] Hope Dictionary