ball cock

noun

Definition of ball cock

: an automatic valve whose opening and closing are controlled by a hollow float at the end of a lever

First Known Use of ball cock

1734, in the meaning defined above

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The first known use of ball cock was in 1734

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Cite this Entry

“Ball cock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ball%20cock. Accessed 6 Jul. 2020.

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