The Collaborative International Dictionary of English v.0.48:

Sailfish \Sail"fish\, n. (Zool.)
      (a) The banner fish, or spikefish (Histiophorus.)
      (b) The basking, or liver, shark.
      (c) The quillback.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Liver \Liv"er\, n. [AS. lifer; akin to D. liver, G. leber, OHG.
   lebara, Icel. lifr, Sw. lefver, and perh. to Gr. ? fat, E.
   live, v.] (Anat.)
   A very large glandular and vascular organ in the visceral
   cavity of all vertebrates.
   [1913 Webster]

   Note: Most of the venous blood from the alimentary canal
         passes through it on its way back to the heart; and it
         secretes the bile, produces glycogen, and in other ways
         changes the blood which passes through it. In man it is
         situated immediately beneath the diaphragm and mainly
         on the right side. See Bile, Digestive, and
         Glycogen. The liver of invertebrate animals is
         usually made up of c[ae]cal tubes, and differs
         materially, in form and function, from that of
         vertebrates.
         [1913 Webster]

   Floating liver. See Wandering liver, under Wandering.


   Liver of antimony, Liver of sulphur. (Old Chem.) See
      Hepar.

   Liver brown, Liver color, the color of liver, a dark,
      reddish brown.

   Liver shark (Zool.), a very large shark (Cetorhinus
      maximus), inhabiting the northern coasts both of Europe
      and North America. It sometimes becomes forty feet in
      length, being one of the largest sharks known; but it has
      small simple teeth, and is not dangerous. It is captured
      for the sake of its liver, which often yields several
      barrels of oil. It has gill rakers, resembling whalebone,
      by means of which it separates small animals from the sea
      water. Called also basking shark, bone shark,
      hoemother, homer, and sailfish; it is sometimes
      referred to as whale shark, but that name is more
      commonly used for the Rhincodon typus, which grows even
      larger.

   Liver spots, yellowish brown patches on the skin, or spots
      of chloasma.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Quillback \Quill"back`\, n. (Zool.)
   An American fresh-water fish (Ictiobus cyprinus syn.
   Carpiodes cyprinus); -- called also carp sucker,
   sailfish, spearfish, and skimback.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sailfish
    n 1: a saltwater fish with lean flesh
    2: large pelagic game fish having an elongated upper jaw and
       long dorsal fin that resembles a sail