trĭlinguis — Lewis & Short
trĭlinguis, e, adj.ter-lingua.
I triple-tongued, having three tongues:
ōs (Cerberi),Hor. C. 3, 11, 20:
cantus (Hecates),Val. Fl. 7, 184:
colla (i. e. serpentis),Prud. Cath. 3, 150. —
II Speaking three tongues or languages: Massilienses (who spoke Greek, Latin, and Gallic), Varr. ap. Isid. Orig. 15, 1 fin.:
Siculi (because they spoke Greek, Punic, and Latin),App. M. 11, p. 259:
ego Hebraeus, Graecus, Latinus: trilinguis,Hier. in Ruf. 3, 6.