a very large oceanic fish (xiphias gladius), the only representative of the family xiphiidae. it is highly valued as a food fish. the bones of the upper jaw are consolidated, and form a long, rigid, swordlike beak; the dorsal fin is high and without distinct spines; the ventral fins are absent. the adult is destitute of teeth. it becomes sixteen feet or more long.-the gar pike.-the cutlass fish.-a southern constellation. see dorado, 1.