Be‐lu″ga (bē̍‐lū″gȧ), n. [Russ. bieluga a sort of large sturgeon, prop. white fish, fr. bieluii white.] (Zoöl.) A cetacean allied to the dolphins.
☞ The northern beluga (Delphinapterus catodon) is the white whale and white fish of the whalers. It grows to be from twelve to eighteen feet long.