Source : Webster's Revised Unabridged Dictionary (1913)

Razorback \Ra"zor*back"\, n. (Zo["o]l.)
   The rorqual.

Source : WordNet®

razorback
     adj : having a sharp narrow back; "a razor-backed horse";
           "razorback hogs" [syn: {razor-backed}]

razorback
     n 1: a mongrel hog with a thin body and long legs and a ridged
          back; a wild or semi-wild descendant of improved breeds;
          found chiefly in the southeastern United States [syn: {razorback
          hog}, {razorbacked hog}]
     2: any of several baleen whales of the family Balaenopteridae
        having longitudinal grooves on the throat and a small
        pointed dorsal fin [syn: {rorqual}]