extratropical cyclone
noun
                                                                                                                            
                                                            ex·tra·trop·i·cal cyclone
                    
                                                                                                              
                                                                                                                                  ˌek-strə-ˌträ-pi-kəl-  
                                                      
                                                          
            
                                
              
          
                                                      : a cyclone in the middle or high latitudes often containing a cold front that extends toward the equator for hundreds of miles                                      
                
                    
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  Merriam-Webster unabridged




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