The Collaborative International Dictionary
                    Prodromal
                    
                        
                
                                                                    Prodromal \Prod"ro*mal\, a. (Med.) Of or pertaining to prodromes; as, the prodromal stage of a disease.
Douglas Harper's Etymology Dictionary
Wiktionary
                    prodromal
                    
                        
                
                                                                    a. Relating to prodrome; indicating an early stage of a disease.
WordNet
                    prodromal
                    
                        
                
                                                                    adj. symptomatic of the onset of an attack or a disease [syn: prodromic]
Usage examples of "prodromal".
Were the strange voices and erotic episodes prodromal of brain damage?