| n. | 1. | (Zool.) A species of whitefish (Coregonus nigripinnis) found in Lake Michigan. |
| Noun | 1. | bluefin - flesh of very large tuna Synonyms: bluefin tuna |
| 2. | bluefin - largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics |