/ bəˈluːgə; NAmE / ( pl. be·luga or be·lugas ) noun
1.
[ C ] a type of small whale
2.
[ C ] a type of large fish that lives in rivers and lakes in eastern Europe
3.
(also beˌluga ˈcaviar ) [ U ] a type of caviar (= fish eggs) , from a beluga
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WORD ORIGIN
late 16th cent. (in senses 2 and 3): from Russian belukha (sense 1), beluga (senses 2 and 3), both from belyĭ white.