Chemical reaction

response caused by mixing chemicals, interaction between chemicals

A chemical reaction is a process that results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. Chemical reactions are usually characterized by a chemical change, and they yield one or more products which are, in general, different from the reactants. Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions.
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Chemical reaction, n rearrangement of atoms or ions accompanying energy change. A catalyst, such as heat or an enzyme, may alter the rate of [more]Chemical reaction - Community and Resources

Noun
1. (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"
(synonym) reaction
(hypernym) chemical process, chemical change, chemical action
(hyponym) addition reaction
(classification) chemistry, chemical science

Interaction between chemicals in which there is a change in the chemical composition of the elements or compounds involved.