Main Entry: be·lu·ga

Pronunciation: \bə-ˈlü-gə\

Function: noun

Etymology: Russian, from belyĭ white; akin to Greek phalios having a white spot — more at bald

Date: 1772

1 : a large white sturgeon (Huso huso syn. Acipenser huso) of the Black Sea, Caspian Sea, and their tributaries; also : caviar processed from beluga roe — compare osetra, sevruga
2 [Russian belukha, from belyĭ] : a toothed whale (Delphinapterus leucas) of arctic and subarctic waters having a fusiform body that is about 10 to 15 feet (3.0 to 5.0 meters) long and white when mature —called also white whale

[beluga illustration]