Lewis & Short

ĕtymŏlŏgĭa, ae, f., = ἐτυμολογία, etymology, Cic. Ac. 1, 8, 32; Quint. 1, 6, 1; 28; 7, 3, 25 et saep. (Cic. Top. 8, 35, written as Greek, and transl. by veriloquium).