green water


Definition of green water

1 : the water in shore on soundings — compare blue water
3 : an opaque greenish condition of the water in an aquarium that is caused by excessive growth of algae and that is harmless and usually healthful to fishes

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First Known Use of green water

1854, in the meaning defined at sense 3

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The first known use of green water was in 1854

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Cite this Entry

“Green water.” Dictionary, Merriam-Webster, Accessed 25 Nov. 2020.

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