pneumatic trough


noun Chemistry.

a trough filled with liquid, especially water, for collecting gases in bell jars or the like by displacement.

Origin of pneumatic trough

First recorded in 1820–30

British Dictionary definitions for pneumatic trough

pneumatic trough

noun

chem a shallow dishlike vessel filled with a liquid, usually water, and used in collecting gases by displacement of liquid from a filled jar held with its open end under the surface of the liquid