1. (Science: zoology) 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 ger pike.
The cutlass fish.