[1] : The Collaborative International Dictionary of English v.0.48

swordfish \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.
          1913 webster

   2. astron. a southern constellation. see dorado, 1.
      1913 webster

   swordfish sucker zool., a remora remora brachyptera
      which attaches itself to the swordfish.
      1913 webster
see also:
xiphias gladius xiphiidae dorado swordfish sucker remora brachyptera 

[2] : WordNet (r) 2.0

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
see also:
swordfish 

Xiphias >> X Words
Xiphias, definition of term: Xiphias
xiphias_pag1.html

Gladius >> G Words
Gladius, definition of term: Gladius
gladius_pag1.html