pneumatic trough

noun Chemistry.
  1. 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pneumatic trough

pneumatic trough

noun
  1. 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
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