bluefin blue fig • bluefin tuna · · · Info · Definitions · Synonyms · Characters · · bluefin · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) flesh of very large tuna. Synonyms: bluefin tuna. · · Noun Definition 1 (noun) largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics. Synonyms: bluefin tuna, horse mackerel, Thunnus thynnus. · · Noun Definition 2 Synonyms · · · bluefin tuna · · Synonym 1 horse mackerel · · Synonym 2 thunnus thynnus · · Synonym 3 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E u latin small letter u U+0075