The Collaborative International Dictionary
                    Dissertator
                    
                        
                
                                                                    Dissertator \Dis"ser*ta`tor\, n. [L.: cf. F. dissertateur.]
   One who writers a dissertation; one who discourses. 
--Boyle.
Wiktionary
                    dissertator
                    
                        
                
                                                                    n. One who writers a dissertation; one who discourses.