The Collaborative International Dictionary
Mala prohibita
Mala \Ma"la\, n. pl.; pl. of Malum. [L.] Evils; wrongs; offenses against right and law.
Mala in se [L.] (Law), offenses which are such from their own nature, at common law, irrespective of statute.
Mala prohibita [L.] (Law), offenses prohibited by statute, as distinguished from mala in se, which are offenses at common law.
Wiktionary
mala prohibita
phr. (malum prohibitum English)