An action or statement in response to a stimulus or other event. / (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition.

(chemistry) A chemical reaction named after its discoverers.

Any engine that generates thrust by expelling matter, especially hot gases produced by igniting a fuel; either a rocket engine or several types of jet engine.

(chemistry) Any vessel used to contain the reactants taking part in a reaction.

(chemistry) Any reaction in which a compound is dissociated into its elements, or in which a molecule is dissociated into atoms

(organic chemistry) The trans oxidation of an alkene, to form a dihydric alcohol, catalyzed by iodine and silver benzoate.

The state of diverse reception, when there are many who praise something while there are also many who dislike it. / (ironical) An unmixed reaction, usually opposition.

(chemistry) any reaction, typically involving organic compounds, in which a cyclic transition state is involved

the state resulting from such a reaction / a process involving change in atomic nuclei

(chemistry) A process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.