Mid 19th century; earliest use found in George Faber (1773–1854), Church of England clergyman and religious writer. From supervise + -al. Compare earlier supervisal.
Definition of supervisal in US English:
supervisal
adjective
Supervisory.
Origin
Mid 19th century; earliest use found in George Faber (1773–1854), Church of England clergyman and religious writer. From supervise + -al. Compare earlier supervisal.