blue whale

noun
a migratory baleen whale, Balaenoptera musculus, mostly of oceans and seas in the Southern Hemisphere, growing to a length of 100 feet (30.5 meters) and having a furrowed, slate-blue skin mottled with lighter spots, in some seas acquiring a yellowish coating of diatoms on the underside: the largest mammal ever known, it is now endangered.
Also called sulfur-bottom.


Origin:
1850–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To blue whale
Collins
World English Dictionary
blue whale
 
n
Also called: sulphur-bottom the largest mammal: a widely distributed bluish-grey whalebone whale, Sibbaldus (or Balaenoptera) musculus, closely related and similar to the rorquals: family Balaenopteridae

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
From swirls of schooling anchovies to blue whale migrations, the majesty of
  marine life is present in every episode.
As for the blue whale, no one would know to make it blue.
But the first full-blown whales were still a long way from a blue whale or any
  other baleen whale.
Perhaps some day another animal will evolve a new strategy that will let it get
  even bigger than a blue whale.
Images for blue whale
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature