Beluga \Be*lu"ga\ (b[-e]*l[=u]"g[.a]), n. [Russ. bieluga a sort of large sturgeon, prop. white fish, fr. bieluii white.]

(Zo["o]l.) A cetacean allied to the dolphins.

Note: 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.

Source: Webster's Revised Unabridged Dictionary (1913)