Noun: blue whale bloow-eyl
- Largest mammal ever known; bluish-grey migratory whalebone whale mostly of Southern Hemisphere
"The blue whale's enormous fluke disappeared beneath the waves";
- sulfur bottom [N. Amer], Balaenoptera musculus, sulphur bottom [Brit, Cdn]
Derived forms: blue whales
Type of: baleen whale, whalebone whale
Part of: Balaenoptera, genus Balaenoptera
Encyclopedia: Blue whale