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See more synonyms for stopcock on Thesaurus.com
  1. cock1(def 3).
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Origin of stopcock

First recorded in 1575–85; stop + cock1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for stopcock

Historical Examples

  • As long as the stopcock is closed the water cannot rise in the inner tube.

    An Elementary Study of Chemistry

    William McPherson

  • At the bottom of the drum there is a stopcock to let off the condensed water.

  • The plug is now inserted in the stopcock, and turned with a gentle pressure.

  • When the outer door was open, I opened the stopcock and shut the door.

    Space Tug

    Murray Leinster

  • The pipes are provided with a stopcock and their mouths are closed by a cap.

British Dictionary definitions for stopcock


  1. a valve used to control or stop the flow of a fluid in a pipe
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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