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exothermic
ex·o·ther·mic [ èksō thúrmik ] or ex·o·ther·mal [ èksō thúrm'l ]


adjective 
Definition:
 
producing heat: describes a chemical reaction that produces heat.
See also  endothermic
[Late 19th century. < French exothermique< Greek thermē "heat"]

ex·o·ther·mi·cal·ly adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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