So·cin·i·an 
(sō-sĭnē-ən)
(sō-sĭnē-ən)n.
An adherent of a 16th-century Italian sect holding unitarian views, including denial of the divinity of Jesus.
adj.
Of or relating to the Socinians or their doctrines.
[New Latin Sociniānus, after Laelius Socinus and Faustus Socinus.]
So·cini·an·ism n.