Photinian
/fə(ʊ)ˈtɪnɪən/Church History
noun
A person whose understanding of the doctrine of the Trinity resembles that of Photinus, a heretical 4th-cent. bishop of Sirmium, who taught some form (variously interpreted) of Monarchianism.
adjective
Of, relating to, or characteristic of Photinus or Photinianism.
Origin
Mid 16th century; earliest use found in John Jewel (1522–1571), bishop of Salisbury. From post-classical Latin Photinianus, adjective and noun from Photinus (Byzantine Greek Φωτεινός: see below), the name of a heretical 4th-cent. bishop of Sirmium + classical Latin -iānus.