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Endothermic \En`do*ther"mic\, a. [Pref. endo- + thermic.] (Chem.) Designating, or pert. to, a reaction which occurs with absorption of heat; formed by such a reaction; as, an endothermic substance; -- opposed to {exothermic}.
endothermic adj : (of a chemical reaction or compound) occurring or formed with absorption of heat [syn: {endothermal}, {heat-absorbing}] [ant: {exothermic}]