1780, "pertaining to hospital patients or hospital care," from clinic + -al (2). Meaning "coldly dispassionate" (like a medical report) is recorded from 1928. The earlier adjective was clinic "of or pertaining to the sick-bed" (1620s). Related: Clinically.
clinical observation
clinical case study
he spoke in the clipped clinical monotones typical of police testimony
cline
cling
clingstone
clingy
clinic
clinical
clinician
clink
clinker
clino-
clinometer