Xiphias gladius
         n 1: 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}, {Xiphias gladius}]

English Dictionary: Xiphias gladius	by the DICT Development Group
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Swordfish \Sword"fish`\, n.       1. (Zo[94]l.)             (a) A very large oceanic fish ({Xiphias gladius}), the                   only representative of the family {Xiphiid[91]}. 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} (Zo[94]l.), a remora ({Remora             brachyptera}) which attaches itself to the swordfish.