(adjective) : bĭlinguis, e, bis - lingua
* Twotongued, double-tongued.
* Lit., having two tongues; humorously, of voluptuous persons kissing, Plaut. Ps. 5, 1, 15; cf. id. Poen. 5, 4, 65.
* Transf.
* Trop.
* Speaking two languages: bilinguis δίγλωσσος, Gloss.: bilingues Bruttates Ennius dixit, quod Bruttii et Osce et Graece loqui soliti sint, Paul. ex Fest. p. 35 Müll.; cf. Commod. p. 350: corvinus, Canusini more bilinguis,Hor. S. 1, 10, 30: sed jam bilingues erant, paulatim a domestico externo sermone degeneres,Curt. 7, 5, 29.
* Double-tongued, hypocritical, deceitful, false, treacherous: tamquam proserpens bestia, est bilinguis et scelestus,Plaut. Pers. 2, 4, 28: edico prius, Ne duplicis habeatis linguas, ne ego bilinguis vos necem,id. Truc. 4, 3, 7 (cf. id. Poen. 5, 2, 74: bisulcilingua quasi proserpens bestia): quippe domum timet ambiguam Tyriosque bilinguis,Verg. A. 1, 661: homo,Phaedr. 2, 4, 25; Sil. 2, 56: os,Vulg. Prov. 8, 13: socii,Sil. 16, 157: insidiae,Claud. B. Gild. 284.
* Fabulae, having a double meaning, allegorical, Arn. 5, p. 228.

s. TLL