Source : Webster's Revised Unabridged Dictionary (1913)

Clinic \Clin"ic\, n. [See {Clinical}.]
   1. One confined to the bed by sickness.

   2. (Eccl.) One who receives baptism on a sick bed. [Obs.]
      --Hook.

   3. (Med.) A school, or a session of a school or class, in
      which medicine or surgery is taught by the examination and
      treatment of patients in the presence of the pupils.

Clinical \Clin"ic*al\, Clinic \Clin"ic\, a. [Gr. ?, fr. ? bed,
   fr. ? to lean, recline: cf. F. clinique. See {Lean}, v. i.]
   1. Of or pertaining to a bed, especially, a sick bed.

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

Source : WordNet®

clinic
     n 1: a medical establishment run by a group of medical
          specialists
     2: meeting for diagnosis of problems and instruction or
        remedial work in a particular activity
     3: a healthcare facility for outpatient care