Definition of baleen whale
: any of a suborder (Mysticeti) of usually large whales typically of colder waters that lack teeth but have baleen plates in the upper jaw which are used to filter chiefly small crustaceans (as krill) out of large quantities of seawater — see fin whale, gray whale, humpback whale, right whale, rorqual — compare toothed whale
First Known Use of baleen whale
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Britannica.com: Encyclopedia article about baleen whale
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