Lewis Short
(adjective) : ămātrĭx, īcis, f.id.
* A female lover, in an honorable and a dishonorable sense, a mistress, sweetheart (syn.: amans, amica): Sappho amatrix,Mart. 7, 69, 9: dicacula,Plaut. As. 3, 1, 8; id. Poen. 5, 5, 25.—Used as : amatrices aquae,amorous,Mart. 7, 15; 10, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary