pertaining to, caused by or of the nature of virus.
                                                            
                                                     
                        
                                                
                        
                        
                            Relating to or caused by a virus. (See Virus.)
                                                            
                                                     
                        
                                                
                        
                        
                            a term describing something related to or caused by a virus
                                                            
                                                     
                        
                                                
                        
                        
                            Of or pertaining to a virus. For example, "My daughter has a viral rash ." See the entire definition of Viral
                                                            
                                                     
                        
                                                
                        
                        
                            caused by a virus, a submicroscopic infectious agent that is regarded as either an extremely simple microorganism or a very complex molecule.