A / applausor
noun hapax

applausor

gen. applausōris · gender masculine · decl. 3rd
(), , applaudo
one that expresses approbation by clapping of hands; an applauder
one that expresses approbation by clapping of hands, an applauder: Idem populus ille aliquando scaenici imperatoris spectator et applausor, Plin. Pan. 46, where Keil now reads plausor.