LAT

Lewis Short

ŏpĕrātor (noun M) : id.
* A worker, operator (post-class.), Firm. Math. 3, 9; Tert. Exhort. ad Castit. 3; id. Apol. 23 fin. al.; Lact. 6, 18, 13; Vulg. Prov. 22, 2.
Charlton T. Lewis, Charles Short, A Latin Dictionary

TLL

s. TLL
Thesaurus Linguae Latinae
memory