What does petcock mean in crosswords?

petcock means: regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining

Word entry · 7 letters

petcock

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7 lettersPronunciation /ˈpɛtkɒk/Part of speech nounSorted ccekoptStarts with PEnds with K0 clues

1P2E3T4C5O6C7K

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regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining

Apparently from pet + cock, because of its size.

“The doctor placed the rubber mask over her face and turned a dial and I watched Catherine breathing deeply and rapidly. Then she pushed the mask away. The doctor shut off the petcock.”
“The shutoff valve (petcock) is usually located on the gas pipe on the supply side of the meter.”

Source: Wiktionary, CC BY-SA 4.0

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