- tu|na
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1. a large sea fish, closely related to the mackerel, having coarse oily flesh that is widely used as food; tunny; horse mackerel. It is valued as a game fish.2. any one of several similar or related fishes.3. the flesh of the tuna. Tuna tastes somewhat like chicken.╂[American English < American Spanish tuna < Spanish atún < Arabic tun < Latin thunnus; see etym. under tunny (Cf. ↑tunny)]–tu´na|like´, adjective.tu|na2 «TOO nuh», noun.1. any one of several prickly pears, especially a treelike pear of tropical America with an edible fruit.2. the fruit itself.
Useful english dictionary. 2012.