Definitions
from The Century Dictionary.
- noun A safetyvalve which opens inward, so connected with a boiler that when there is a vacuum it will be forced open by atmospheric pressure. Also called
air-valve. E. H. Knight .
Etymologies
Sorry, no etymologies found.
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Examples
-
He set up a vacuum-valve arrangement in the base of a large glass jar.
The Pirates of Ersatz Murray Leinster 1935
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