Webster's Revised Unabridged Dictionary · 1913

Trophonian

Trophonian , adjective

[Latin Trophonianus, from Trophonius, Greek {not transcribed}, 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 Bootia.]

Of or pertaining to Trophonius, his architecture, or his cave and oracle.