chemical reaction

noun
1.
Chemistry, reaction (def 7).
British Dictionary definitions for chemical reactions

chemical reaction

noun
1.
a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei Compare nuclear reaction
chemical reactions in Culture

chemical reaction definition


A process in which atoms of the same or different elements rearrange themselves to form a new substance. While they do so, they either absorb heat or give it off.