ornithology
noun
                                                                                                                            
                                                            or·ni·thol·o·gy
                    
                                                                                                              
                                                                                                                                  ˌȯr-nə-ˈthä-lə-jē 
                                                      
                                                          
            
            
               plural ornithologies            
        
    1
                    
                                          
              
          
                                                      : a branch of zoology dealing with birds                                      
                
                    
2
                    
                                          
              
          
                                                      : a treatise on ornithology                                      
                
                    
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  Merriam-Webster unabridged




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