2. (Arith. & Alq.) The act or process of reducing. See
{Reduce}, v. t., 6. and {To reduce an equation}, {To
reduce an expression}, under {Reduce}, v. t.
3. (Astron.)
(a) The correction of observations for known errors of
instruments, etc.
(b) The preparation of the facts and measurements of
observations in order to deduce a general result.
4. The process of making a copy of something, as a figure,
design, or draught, on a smaller scale, preserving the
proper proportions. --Fairholt.
5. (Logic) The bringing of a syllogism in one of the
so-called imperfect modes into a mode in the first figure.
6. (Chem. & Metal.) The act, process, or result of reducing;
as, the reduction of iron from its ores; the reduction of
aldehyde from alcohol.
7. (Med.) The operation of restoring a dislocated or
fractured part to its former place.
{Reduction ascending} (Arith.), the operation of changing
numbers of a lower into others of a higher denomination,
as cents to dollars.
{Reduction descending} (Arith.), the operation of changing
numbers of a higher into others of a lower denomination,
as dollars to cents.
Syn: Diminution; decrease; abatement; curtailment;
subjugation; conquest; subjection.