Definition of ball cock
: an automatic valve whose opening and closing are controlled by a hollow float at the end of a lever
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“Ball cock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ball%20cock. Accessed 13 Aug. 2022.
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Time Traveler for ball cock
The first known use of ball cock was in 1734
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