Definition of right whale
: any of several large baleen whales (family Balaenidae and especially genus Eubalaena) that lack a dorsal fin and have very long baleen plates, an extremely large head with a V-shaped blowhole, a smooth throat, short, broad, rounded flippers, and whitish protuberances of thickened skin about the head
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Merriam-Webster unabridged
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Time Traveler for right whale
The first known use of right whale was in 1725
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