a sect of heretics who flourished towards the close of the 4th century; so called from Marcellus of Ancyra, whom the Arians unjustly accused of reviving the errors of Sabellius. Epiphanius informs us that great diversity of opinion prevailed in his day on the justness of charging Marcellus of Ancyra with the heretical tendencies of the so-called Marcellians. The latter denied the three hypostases, holding the Son and the Holy Ghost as two emanations from the divine nature, to exist independently only until the performance of their respective offices, and then to return again into the substance of the Father. (See MARCELLUS OF ANCYRA).