Mid 17th century; earliest use found in John Gaule (1603/4–1687), Church of England clergyman and author. Origin uncertain; perhaps an alteration of consciential after formations in -tional.
Definition of conscientional in US English:
conscientional
adjective
= consciential.
Origin
Mid 17th century; earliest use found in John Gaule (1603/4–1687), Church of England clergyman and author. Origin uncertain; perhaps an alteration of consciential after formations in -tional.