a. [ L. Trophonianus, fr. Trophonius, Gr. &unr_;, a Grecian architect, fabled to have been the builder of the first temple of Apollo at Delphi. He was worshiped after death, and had a celebrated oracle in a cave in Bœotia. ] Of or pertaining to Trophonius, his architecture, or his cave and oracle. [ 1913 Webster ]