a trough filled with liquid, especially water, for collecting gases in bell jars or the like by displacement.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use pneumatic trough in a sentence
A glass tube brings it into communication with a bell jar full of water on the shelf of the pneumatic trough.The Life of the Fly | J. Henri Fabre
A weighed amount of oxide of silver is placed in a glass tube connected with a pneumatic trough.Scientific Culture, and Other Essays | Josiah Parsons Cooke
The vessel C (Fig. 4), containing the water in which the bottles are inverted, is called a pneumatic trough.An Elementary Study of Chemistry | William McPherson
The gas comes over in large quantities, and must be collected in a gas jar, or the pneumatic trough.
Carbonic acid is rapidly evolved, and may be collected, with some loss, over water in the pneumatic trough.
British Dictionary definitions for pneumatic trough
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012