Thunnus thynnus thun·nust·hyn·nus uncommon noun 1. largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics Synonymsbluefinbluefin tunahorse mackerelThunnus thynnus Related words Broader terms tuna Parts Thunnus Part of bluefin WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
