keraulophon|kɛˈrɔːləfɒn| [f.Gr. κεραύλης hornblower + ϕωνή voice.] A manual stop on the organ (seequot.), first used in 1843. 1876J. Hiles Catech. Organ ix. (1878) 67 Keraulophon, an 8 feet manual stop of metal, and of a pleasant, reedy quality of tone.