noun
: the study of transition processes (as from one allotropic form to another) or of chemical changes in a substance as indicated by abrupt evolution or absorption of heat accompanying such processes
noun
: the study of transition processes (as from one allotropic form to another) or of chemical changes in a substance as indicated by abrupt evolution or absorption of heat accompanying such processes
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012