1. Flesh of very large tuna
   - bluefin tuna 
2. Largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics
   - bluefin tuna, horse mackerel, Thunnus thynnus

Derived forms: bluefins

Type of: tuna, tuna fish, tunny

Part of: genus Thunnus, Thunnus

• uppermost
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• uppity
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• UPPP
• Uppsala
• upraise
• upraised
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• uprear
• upright
• upright piano
• uprightly
• uprightness
• uprise
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• upriver
• uproar
• uproarious
• uproariously
• uproot
• uprooter
• uprush