Lewis Short
apprŏbātor | adp- (noun M) : (), , id.
* One who gives his assent or approval, an approver (perh. only in the two foll. exs.): quamvis non fueris suasor et impulsor profectionis meae, adprobator certe fuisti, * Cic. Att. 16, 7, 2: verbi, * Gell. 5, 21, 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary