1909, in the meaning defined above
International Scientific Vocabulary pleus- (irregular from Greek plein to sail, float) + -on (as in plankton)
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Cite this Entry
“Pleuston.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pleuston. Accessed 19 Aug. 2022.
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Britannica.com: Encyclopedia article about pleuston
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