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Balaenoptera physalus

Source : Webster's Revised Unabridged Dictionary (1913)

Rorqual \Ror"qual\, n. [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.

Source : WordNet®

Balaenoptera physalus
     n : large flat-headed whalebone whale having deep furrows along
         the throat; of Atlantic and Pacific [syn: {finback}, {finback
         whale}, {fin whale}, {common rorqual}]
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