Beluga

Chamber's Twientieth Century Dictionary · 1908 · p. 13

be-lōō′ga, n. the white whale, one of the dolphin family, closely allied to the narwhal, 12 to 16 feet long, of creamy-white colour, found in droves round Green land and all over the Arctic seas: applied also to a great Ru ian sturgeon—the Acipenser Huso . [Ru .]