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whale louse

noun
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Definition of whale louse

1 : any of several degenerate amphipod crustaceans (genus Cyamus) parasitic on cetaceans
2 : whale barnacle

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“Whale louse.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/whale%20louse. Accessed 29 January 2020.

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