exothermic

From French exothermique, from exo- (“outside”) + thermique (“of heat”), both ultimately from Ancient Greek.

exothermic (comparative more exothermic, superlative most exothermic)

1. (chemistry, of a reaction) That releases energy in the form of heat.
2. (chemistry, of a compound) That releases heat during its formation, and absorbs it during its decomposition
3. (zoology) Of an animal: whose body temperature is regulated by external factors; cold-blooded.

• exothermically
• exothermicity
• nonexothermic

• exotherm

• exothermal

• endothermic

• hemicortex