Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A hinged valve that permits fluids to flow in only one direction and clacks when the valve closes.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a simple valve with a hinge on one side; allows fluid to flow in only one direction

Etymologies

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Examples

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