Trŏphōnĭus, ii, m., = Τροφώνιος.
I A brother of Agamedes , in conjunction with whom he built the temple of Apollo at Delphi , Cic. Tusc. 1, 47, 114.—
II A deity that imparted oracles in a cave near Lebadia , in Boeotia; sometimes called also Juppiter Trophonius, Cic. Div. 1, 34, 74; id. N. D. 3, 19, 49; Liv. 45, 27, 8; Plin. 34, 8, 19, § 66; 31, 2, 11, § 15.
III —Hence, Trŏphōnĭānus , a, um, adj., of or belonging to Trophonius , Trophonian : narratio Chaeronis, of a certain Chaeron , who descended into Trophonius's cave , Cic. Att. 6, 2, 3.