[tu.na] n [Sp, fr. Taino] (ca. 1555) 1: any of various flat-jointed prickly pears (genus Opuntia); esp: one (O. tuna) of tropical America
2: the edible fruit of a tuna
[2]tu.na n, pl tuna or tunas [AmerSp, alter. of Sp atun, modif. of Ar tun, fr. L thunnus, fr. Gk thynnos] (1881) 1: any of numerous large vigorous scombroid food and sport fishes (as an albacore or a bluefin tuna)
2: the flesh of a tuna esp. when canned for use as food--called also tuna fish