Source : Webster's Revised Unabridged Dictionary (1913)

Remittent \Re*mit"tent\ (r?-m?t"tent), a. [L. remittens, p. pr.
   : cf. F. r['e]mittent.]
   Remitting; characterized by remission; having remissions.

   {Remittent fever} (Med.), a fever in which the symptoms
      temporarily abate at regular intervals, but do not wholly
      cease. See {Malarial fever}, under {Malarial}.

Source : WordNet®

remittent
     adj : (of a disease) characterized by periods of diminished
           severity; "a remittent fever"