butterfly dam

noun

Definition of butterfly dam

: a movable steel dam pivoted at top and bottom and opened and closed by a rack-and-pinion mechanism and electric motor

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History and Etymology for butterfly dam

so called from its opening like the wings of a butterfly

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Dictionary Entries Near butterfly dam

butterfly crab

butterfly dam

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Cite this Entry

“Butterfly dam.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butterfly%20dam. Accessed 25 Oct. 2021.

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