- (of a biochemical reaction) requiring energy.
- (of a biochemical reaction) requiring energy to proceedCompare exergonic
- Of or relating to a chemical reaction that absorbs energy and therefore cools its surroundings.
- Relating to a chemical reaction that requires the absorption of energy. The production of sugars by plants during photosynthesis is an endergonic reaction, where sunlight provides the necessary energy. Compare exergonic.