petcock Hear it!

petcock definition

pet·cock (pet′käk′)

noun

a small faucet or valve used in draining unwanted or excess water or air from pipes, radiators, boilers, etc.

Etymology: < obs. pet (< Fr: see petard) + cock

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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