Noun tuna has 4 senses
  1. tuna, Opuntia tuna - tropical American flat-jointed prickly pear; Jamaica
    --1 is a kind of prickly pear, prickly pear cactus
  2. tuna, tuna fish, tunny - important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
    --2 is a kind of saltwater fish
    --2 is a part of tuna, tunny
    --2 has particulars: albacore; bonito; bluefin, bluefin tuna
  3. tuna, tunny - any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters
    --3 is a kind of scombroid, scombroid fish; food fish
    --3 is a member of Thunnus, genus Thunnus
    --3 has parts: tuna, tuna fish, tunny
    --3 has particulars:
     albacore, long-fin tunny, Thunnus alalunga; bluefin, bluefin tuna, horse mackerel, Thunnus thynnus; yellowfin, yellowfin tuna, Thunnus albacares
  4. tuna, Anguilla sucklandii - New Zealand eel
    --4 is a kind of eel
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