Lewis Short
amplĭfĭcātor (noun M) : id.
* He who enlarges, an amplifier (very rare): rerum,Cic. Tusc. 5, 4, 10: MVNICIPII,Inscr. Orell. 1025: VRBIS ROMAE,Inscr. Grut. 282, 3.—Trop.: dignitatis,Cic. Fam. 10, 12.
Charlton T. Lewis, Charles Short, A Latin Dictionary