Source : Webster's Revised Unabridged Dictionary (1913)

Crepitant \Crep"i*tant\ (kr?p"?-tant), a. [See {Crepitate}.]
   Having a crackling sound; crackling; rattling.

   {Crepitant rale} (Med.), a peculiar crackling sound audible
      with inspiration in pneumonia and other lung disease.