or pet cock

[ pet-kok ]
/ ˈpɛtˌkɒk /


a small valve or faucet, as for draining off excess or waste material from the cylinder of a steam engine or an internal-combustion engine.

Origin of petcock

1860–65; pet, perhaps < French pet (see petard) + cock1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for petcock

  • One crawled in and settled down, and turned the petcock that inflated the cover.

    Space Tug|Murray Leinster

British Dictionary definitions for petcock

/ (ˈpɛtˌkɒk) /


a small valve for checking the water level in a steam boiler or draining condensed steam from the cylinder of a steam engine

Word Origin for petcock

C19: from pet 1 or perhaps French pet, from péter to break wind + cock 1
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