Added 1 October 2026 acacian noun Categories: Obscure Words noun ! Definition from The Century Dictionary., via Wordnik. More about acacian at Wordnik → Where our words come from → In ecclesiastical history, a member of a sect or school of moderate Arians of the fourth century, named Acacians from their leader, Acacius, bishop of Cæsarea. from The Century Dictionary. via Wordnik Related Words: schismariancalcidiusacephaliteeusebianarchelaushieracianeudoxiansamosatenianicarianacephaliambrosian Back to today's word