Source : Webster's Revised Unabridged Dictionary (1913)

Cero \Ce"ro\, n. [Corrupt. fr. Sp. sierra saw, sawfish, cero.]
   (Zo["o]l.)
   A large and valuable fish of the Mackerel family, of the
   genus {Scomberomorus}. Two species are found in the West
   Indies and less commonly on the Atlantic coast of the United
   States, -- the common cero ({Scomberomorus caballa}), called
   also {kingfish}, and spotted, or king, cero ({S. regalis}).

Source : WordNet®

cero
     n 1: large edible mackerel of temperate United States coastal
          Atlantic waters [syn: {pintado}, {kingfish}, {Scomberomorus
          regalis}]
     2: large mackerel with long pointed snout; important food and
        game fish of the eastern Atlantic coast southward to
        Brazil [syn: {king mackerel}, {cavalla}, {Scomberomorus
        cavalla}]