Obs. Music. Also (corruptly) effauz. The fuller name (F fa ut) of the note F, which was sung to the syllable fa or ut according as it occurred in one or other of the Hexachords (imperfect scales) to which it could belong.
a. 1327. Learn. Music, in Rel. Ant., I. 292. Of effauz and elami ne coud y nevere are.
1672. Villiers (Dk. Buckhm.), Rehearsal, II. v. A certain note … in Effaut flat.
