albacore /ˈæl.bə.koɹ/ noun1 •A longfin tuna, a large marine fish (Thunnus alalunga) of warm seas, having edible flesh.But most of all, they were jealous because these strangers feasted daily on great turtle, albacore and sail-fish, the sweetest of all seafoods. — 1929 formsalbacores