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Noun: Balaenoptera musculus
  1. Largest mammal ever known; bluish-grey migratory whalebone whale mostly of southern hemisphere
    - blue whale, sulfur bottom [N. Amer], sulphur bottom [Brit, Cdn]

Type of: baleen whale, whalebone whale

Part of: Balaenoptera, genus Balaenoptera

Encyclopedia: Balaenoptera musculus