novatian

from The Century Dictionary.

• Of or pertaining to Novatianus and his followers, or their doctrines.
• noun In church hist., one of a sect founded in the middle of the third century by Novatianus (also called Novatus), a presbyter of Rome, who had himself consecrated bishop of Rome in opposition to Cornelius in 251.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Eccl. Hist.) One of the sect of Novatius, or Novatianus, who held that the lapsed might not be received again into communion with the church, and that second marriages are unlawful.