The Collaborative International Dictionary of English v.0.48:

Clinical \Clin"ic*al\ (kl[i^]n"[i^]k*al), Clinic \Clin"ic\
   (kl[i^]n"[i^]k), a. [Gr. kliniko`s, fr. kli`nh bed, fr.
   kli`nein to lean, recline: cf. F. clinique. See Lean, v.
   i.]
   1. Of or pertaining to a bed, especially, a sick bed.
      [1913 Webster]

   2. Of or pertaining to a clinic, or to the study of disease
      in the living subject.
      [1913 Webster]

   Clinical baptism, baptism administered to a person on a
      sick bed.

   Clinical instruction, instruction by means of clinics.

   Clinical lecture (Med.), a discourse upon medical topics
      illustrated by the exhibition and examination of living
      patients.

   Clinical medicine, Clinical surgery, that part of
      medicine or surgery which is occupied with the
      investigation of disease in the living subject.
      [1913 Webster]