Lewis & Short

bĭpătens, entis, adj. [bis-pateo], opening in two ways, open in two directions (acc. to Serv. ad Verg. A. 10, 5, used by Enn.; cf. Ann. v. 62 Vahl.; but only two exs. in Verg. are preserved): portis alii bipatentibus assunt, i.e. portis duarum valvarum, Verg. A. 2, 330 Wagn.
Of the doors of the dwellings of the gods: considunt tectis bipatentibus, Verg. A. 10, 5 (est autem sermo Ennianus tractus ab ostiis, quae ex utrāque parte aperiuntur, Serv.).