cat·e·chu·men 
(kăt′ĭ-kymən)
(kăt′ĭ-kymən)n.
1. One who is being taught the principles of Christianity.
2. One who is being instructed in a subject at an elementary level.
[Middle English cathecumine, from Old French catechumene, from Latin catēchūmenus, from Greek katēkhoumenos, present passive participle of katēkhein, to instruct; see CATECHIZE.]