(chemistry) The reaction of a Grignard reagent (an organo-magnesium halide) with aldehydes or ketones to form secondary or tertiary alcohols

(chemistry) any of the participants present at the start of a chemical reaction

(chemistry) a unimolecular nucleophilic substitution reaction

(chemistry) a reaction in which one functional group is replaced with another

(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.

(physics, electrics) The opposition to the change in flow of current in an alternating current circuit, due to inductance and capacitance; the imaginary part of the impedance. Symbol: X.

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

(chemistry) Either the oxidation or the reduction component of a redox reaction

(chemistry) a bimolecular nucleophilic substitution reaction

A process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes; the reaction products may contain a different element or a different isotope of the same element.