osetrova
/ˌɒsɪˈtrəʊvə/(also ocietrova, ossetrova, ossietrovaya)
noun
Caviar from the Russian sturgeon, Acipenser gueldenstaedtii. Hence also: the fish itself.
Origin
1920s; earliest use found in The Times. From Russian osetrova(ja), use as noun of feminine of osetrov(yj) of sturgeon (from osëtr + -ov(yj), suffix forming adjectives), short for ikra osetrova(ja) sturgeon's caviar.