From The Collaborative International Dictionary of English v.0.44 [gcide]:
Razorback \Ra"zor*back'\ (r[=a]"z[~e]r*b[a^]k'), noun (Zo["o]l.) The rorqual.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Rorqual \Ror"qual\, noun [Norw. rorqualus a whale with folds.] (Zo["o]l.) A very large North Atlantic whalebone whale ({Physalus antiquorum}, or {Bal[ae]noptera physalus}). It has a dorsal fin, and strong longitudinal folds on the throat and belly. Called also {razorback}.
Note: It is one of the largest of the whales, somethimes becoming nearly one hundred feet long, but it is more slender than the right whales, and is noted for its swiftness. The name is sometimes applied to other related species of finback whales.
From WordNet (r) 2.0 [wn]:
adjective
1: having a sharp narrow back; "a razor-backed horse"; "razorback hogs" [syn: {razor-backed}]
noun
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}]
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