Source : Webster's Revised Unabridged Dictionary (1913)

Purrulence \Pur"ru*lence\, Purulency \Pu"ru*len*cy\, n. [L.
   purulentia: cf. F. purulence.] (Med.)
   The quality or state of being purulent; the generation of
   pus; also, the pus itself. --Arbuthnot.

Source : WordNet®

purulency
     n : symptom of being purulent (containing or forming pus) [syn:
         {purulence}]