plural of Novatian

A Roman priest, who became an antipope against St. Cornelius in 251 AD, and considered by the Catholic Church to be a schismatic heresiarch as founder of a Christian sect known as Novatianism

A follower of Novatianism.

relating to the heresiarch Novatian (see above) and/or his schismatic sect, Novatianism

(historical, Christianity) A rigorist Christian sect that opposed re-admitting baptised Christians who had previously renounced their faith under persecution and by extension all those who had committed a mortal sin, founded by the priest and antipope Novatian in the third century.