catechumen :- "1. One who is being taught the principles of Christianity. 2. One who is being instructed in a subject at an elementary level." AHD. < katekhein 'to teach' (< kata- + ekhein 'to sound').

"The catechumens were being catechized during the catechism by none other than the Heresiarch Priscillianus, Bishop of Avila." Leon O'Roasery, Just Who Is Buried at Santiago de Campostella?