Sword·fish n.
 1. Zool. (a) 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. (b) The gar pike. (c) The cutlass fish.
 2. Astron. A southern constellation. See Dorado, 1.
 Swordfish sucker Zool., a remora (Remora brachyptera) which attaches itself to the swordfish.

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 Xiphias gladius
      n : large toothless marine food fish with a long swordlike upper
          jaw; not completely cold-blooded i.e. they are able to
          warm their brains and eyes: worldwide in warm waters but
          feed on cold ocean floor coming to surface at night [syn:
           swordfish]