dispŭtātor, ōris, m. [disputo],
a disputer, disputant (rare): subtilis, * Cic. Off. 1, 1, 3: suae artis unumquemque et auctorem et disputatorem optimum esse, Val. Max. 8, 12 init.
disputātor ōris, m disputo, a disputer, disputant : subtilis. ...
An Elementary Latin Dictionary