catechumen
Concise Oxford English Dictionary © 2008 Oxford University Press:
catechumen /ˌkatɪˈkjuːmɛn/
▶noun a Christian preparing for baptism or confirmation.
– origin ME: via eccles. L. from Gk katēkhoumenos ‘being instructed’, pres. part. of katēkhein (see catechize).
'catechumen' also found in these Oxford entries:

