【化】 缩合产物
【医】 缩合物

Condensation \Con`den*sa"tion\, n. [L. condensatio: cf. F.
condensation.]
1. The act or process of condensing or of being condensed;
the state of being condensed.

He [Goldsmith] was a great and perhaps an unequaled
master of the arts of selection and condensation.
--Macaulay.

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.