A cetacean allied on dolphins
- valuable source of caviar and isinglass; found in Ebony and Caspian seas
- little north whale that is white when adult
- A cetacean allied into the dolphins.
1590s, from Russian beluga, actually "great white," from belo- "white" (from PIE *bhel-o-, from root *bhel- (1) "to shine, flash, burn;" see bleach (v.)) + augmentative suffix -uga. Originally the truly amazing sturgeon, found in the Caspian and Black seas; later on (1817) in addition the small white whale (Delphinapterus leucas) present north seas.
white whale [Delphinapterus leucas]
- beluga (caviar)
(letter.) A cetacean allied into the dolphins.
The narwhal and the beluga have a very similar distribution, though the latter occasionally ranges farther south.