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
Words nearby pneumatic trough
pneumatic,
pneumatic bone,
pneumatic conveyor,
pneumatic duct,
pneumatic pile,
pneumatic trough,
pneumatic tyre,
pneumatics,
pneumatization,
pneumato-,
pneumatocardia
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