2. (Physics) The act or process of reducing, by depression of temperature or increase of pressure,
etc., to another and denser form, as gas to the condition of a liquid or steam to water.
3. (Chem.) A rearrangement or concentration of the different constituents of one or more substances
into a distinct and definite compound of greater complexity and molecular weight, often resulting in an
increase of density, as the condensation of oxygen into ozone, or of acetone into mesitylene.
Condensation product (Chem.), a substance obtained by the polymerization of one substance, or by
the union of two or more, with or without separation of some unimportant side products. Surface
condensation, the system of condensing steam by contact with cold metallic surfaces, in distinction
from condensation by the injection of cold water.
(Con*den"sa*tive) a. [Cf. F. condensatif.] Having the property of condensing.
(Con*dense") v. t. [imp. & p. p. Condensed ; p. pr. & vb. n. Condensing.] [L. condensare;
con- + densare to make thick or dense, densus thick, dense: cf. F. condenser. See Dense, and cf.
1. To make more close, compact, or dense; to compress or concentrate into a smaller compass; to consolidate; to
abridge; to epitomize.
In what shape they choose,
Dilated or condensed, bright or obscure.
The secret course pursued at Brussels and at Madrid may be condensed into the usual formula, dissimulation,
procrastination, and again dissimulation.
2. (Chem. & Physics) To reduce into another and denser form, as by cold or pressure; as, to condense
gas into a liquid form, or steam into water.
Condensed milk, milk reduced to the consistence of very thick cream by evaporation (usually with
addition of sugar) for preservation and transportation. Condensing engine, a steam engine in which
the steam is condensed after having exerted its force on the piston.
Syn. To compress; contract; crowd; thicken; concentrate; abridge; epitomize; reduce.
(Con*dense"), v. i.
1. To become more compact; to be reduced into a denser form.
Nitrous acid is gaseous at ordinary temperatures, but condenses into a very volatile liquid at the zero of
2. (Chem.) (a) To combine or unite (as two chemical substances) with or without separation of some
unimportant side products. (b) To undergo polymerization.
(Con*dense"), a. [L. condensus.] Condensed; compact; dense. [R.]
The huge condense bodies of planets.
1. One who, or that which, condenses.
2. (Physic) (a) An instrument for condensing air or other elastic fluids, consisting of a cylinder having a
movable piston to force the air into a receiver, and a valve to prevent its escape. (b) An instrument for
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