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humpback whale

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noun
  1. a large whalebone whale of the genus Megaptera having long narrow flippers, and noted for its habit of arching deeply as it dives: once abundant in coastal waters, it is now rare but its numbers are increasing.

Origin of humpback whale

First recorded in 1715–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018