Late 17th century; earliest use found in John Covel (1638–1722), college head. From Byzantine Greek ὠράριον (also ὀράριον) from post-classical Latin orarium.
Definition of orarion in US English:
orarion
noun
Christian Church
= orarium.
Origin
Late 17th century; earliest use found in John Covel (1638–1722), college head. From Byzantine Greek ὠράριον (also ὀράριον) from post-classical Latin orarium.