Oratrix

·noun A woman plaintiff, or complainant, in equity pleading.

oratrix
ōrātrix, īcis, f. [orator]. I She that prays or beseeches , a female suppliant (rare but class.)...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
oratrix
ōrātrīx īcis, f orator, she that prays, a female suppliant : pacis et foederis. ...

An Elementary Latin Dictionary