I. (ˈ)nī|sēən adjective
Usage: usually capitalized
Etymology: Nicaea, ancient city, Asia Minor (from Latin) + English -an — more at nicene
: nicene
II. noun
( -s )
1. capitalized : a native or inhabitant of Nicaea
2. usually capitalized : a 4th or 5th century adherent of the Nicene Creed