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.

plural of reaction

Of or pertaining to a reaction (in any sense)

(politics) Synonym of reactionaryism

(physics) A nuclear reaction in which particles produced by the fission of one atom trigger fissions of other atoms. / (figuratively) A series of events, each one causing or influencing the next.

plural of Suzuki reaction

(chemistry) The organic reaction of an aryl- or vinyl-boronic acid with an aryl- or vinyl-halide or pseudohalide, such as triflates, catalyzed by a palladium(0) complex, widely used to synthesize polyolefins, styrenes, and substituted biphenyls.

(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.