pneumatic trough

pneumatic trough

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

Origin:
1820–30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pneumatic trough is always a great word to know.
So is scavenger. Does it mean:
a reaction in which two or more substances combine to form another compound
a chemical that consumes or renders inactive the impurities in a mixture
Collins
World English Dictionary
pneumatic trough
 
n
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 10th Edition
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