You know what it looks like… but what is it called?
TAKE THE QUIZ“opere”
The following 3 entries include the term opere.
ex opere operantis
: in virtue of the agent —used of a sacrament considered in relation to the conditions required for its valid administration or for its worthy reception compare ex opere operato
ex opere operato
: in virtue of the action —used of a sacrament considered independently of the merits of the minister or the recipient compare ex opere operantis
opere citato
adverb: in the work quoted —abbreviation op. cit. or o.c.