dashcam
noun
                                                                                                                            
                                                            dash·cam
                    
                                                                                                              
                                                                                                                                  ˈdash-ˌkam 
                                                      
                                                          
            
            variants  
 or less commonly dash cam  
 or dashboard camera
        
    
            
               plural dashcams also dash cams or dashboard cameras            
        
    
                                
              
          
                                                      : a video camera mounted usually on the dashboard of a vehicle and used to continuously record activity through the vehicle's windshield                                      
              
                             
Typically, police dashcams are used to gather evidence during traffic stops.—
Janissa Delzo
                                       The fight took place on the right side of the police car, out of view from the dash cam.—
Nathalie Baptiste
                         
                
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  Merriam-Webster unabridged




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