from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Exothermic.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Occurring with the release of energy.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (of a nuclear reaction) occurring with evolution or releasing of energy
exo- + Greek ergon, work; see werg- in Indo-European roots + -ic.(American Heritage® Dictionary of the English Language, Fourth Edition)