| a. | 1. | (Chem.) Designating, or pert. to, a reaction which occurs with absorption of heat; formed by such a reaction; |
| Adj. | 1. | endothermic - (of a chemical reaction or compound) occurring or formed with absorption of heat Synonyms: endothermal, heat-absorbing Antonyms: exothermal, exothermic, heat-releasing - (of a chemical reaction or compound) occurring or formed with evolution of heat |
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