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check valve

noun
1.
a valve permitting liquids or gases to flow in one direction only.
Origin
1875-1880
1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for check-valve

check valve

noun
1.
a valve that closes by fluid pressure to prevent return flow Also called nonreturn valve
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
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16
17
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