sermōcĭnātrix — Lewis & Short
sermōcĭnātrix, īcis, f.sermocinator,
I that converses, adapted to conversation; in rhet. lang., as a part of rhetoric, a transl. of the Platonic prosomilhtikh/, Quint. 3, 4, 10.—In gen.:
immodica,i. e. a prattler, babbler, App. M. 9, p. 224, 31.