catechesis
Concise Oxford English Dictionary © 2008 Oxford University Press:
catechesis /ˌkatɪˈkiːsɪs/
▶noun religious instruction given in preparation for Christian baptism or confirmation.
■ (in Roman Catholic use) religious instruction in general.
– origin C18: via eccles. L. from Gk katēkhēsis ‘oral instruction’.
'catechesis' also found in these Oxford entries:

