
n.
- The act or process of reducing.
- The result of reducing: a reduction in absenteeism.
- The amount by which something is lessened or diminished: a reduction of 12 percent in violent crime.
- Biology. The first meiotic division, in which the chromosome number is reduced. Also called reduction division.
- Chemistry.
- A decrease in positive valence or an increase in negative valence by the gaining of electrons.
- A reaction in which hydrogen is combined with a compound.
- A reaction in which oxygen is removed from a compound.
- Mathematics.
- The canceling of common factors in the numerator and denominator of a fraction.
- The converting of a fraction to its decimal equivalent.
- The converting of an expression or equation to its simplest form.
[Middle English reduccion, restoration, from Old French reduction, from Latin reductiō, reductiōn-, from reductus, past participle of redūcere, to bring back. See reduce.]
reductional re·duc'tion·al adj.



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