1
                    
        a
    
          
                                          
              
          
                                                      : descent in a line from a common progenitor                                      
                
                    
        b
    
          
                                          
              
          
                                                      : derivation                                      
              
                             
the gun's direct lineage is in the 1960s—
Erik Larson
                         
                
                    2
                    
                                          
              
          
                                                      : a group of individuals tracing descent from a common ancestor                                      
                
                                
            especially                
          
                                                      : such a group of persons whose common ancestor is regarded as its founder                                      
            
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  Merriam-Webster unabridged




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