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vapour lock

British  

noun

  1. a stoppage in a pipe carrying a liquid caused by a bubble of gas, esp such a stoppage caused by vaporization of the petrol in the pipe feeding the carburettor of an internal-combustion engine

"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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