blue whale(redirected from Sibbald's rorqual)
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Related to Sibbald's rorqual: Balaenoptera musculus
A very large baleen whale (Balaenoptera musculus) having a bluish-gray back and grooves on the throat. It is thought to be the largest animal ever to have lived on earth, reaching a length of up to 32 meters (105 feet).
(Animals) the largest mammal: a widely distributed bluish-grey whalebone whale, Sibbaldus (or Balaenoptera) musculus, closely related and similar to the rorquals: family Balaenopteridae. Also called: sulphur-bottom
a baleen whale, Balaenoptera musculus, having furrowed, slate-blue skin: at up to 100 ft. (30.5 m) long, the largest mammal ever known.
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|Noun||1.||blue whale - largest mammal ever known; bluish-grey migratory whalebone whale mostly of southern hemisphere|
baleen whale, whalebone whale - whale with plates of whalebone along the upper jaw for filtering plankton from the water