nManuductor(Mus) A conductor; an officer in the ancient church who gave the signal for the choir to sing, and who beat time with the hand, and regulated the music.
Century Dictionary and Cyclopedia
nmanuductorOne who leads by the hand; a leader; a guide; specifically, in medieval music, one who indicated the rhythm to a choir by beating time with his hand or by striking pieces of wood or shell together; a conductor.
Webster's Revised Unabridged Dictionary
L. manus, the hand + ductor, a leader, ducere, to lead: cf. F. manuducteur,
He is strictly and literally a manuductor.
"Blackwood's Edinburgh Magazine, Volume 63, No. 392, June, 1848" by Various