exothermic

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

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exothermic (comparative more exothermic, superlative most exothermic)

1. (chemistry, of a reaction) That releases energy in the form of heat.
   • 2014, William J. Brock, Barbara Mounho, Lijie Fu, The Role of the Study Director in Nonclinical Studies, page 174:

     These can be differentiated on a thermal scan where an endothermic transition indicates enantiotropes and an exothermic transition indicates monotropes.

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.

• exothermal

• endothermic

• exothermically
• exothermicity
• nonexothermic

• exotherm

• hemicortex