plausor

ōris, m.

id.

I. one who claps applause, an applauder (poet. and in post-Aug. prose): in vacuo laetus sessor plausorque theatro, Hor. Ep. 2, 2, 130; Petr. 5; Suet. Ner. 25.
Lewis & Short
A Latin Dictionary, 1879
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