Source : Webster's Revised Unabridged Dictionary (1913)

Encyclopedism \En*cy`clo*pe"dism\, n.
   The art of writing or compiling encyclopedias; also,
   possession of the whole range of knowledge; encyclopedic
   learning.

Source : WordNet®

encyclopedism
     n : profound scholarly knowledge [syn: {eruditeness}, {erudition},
          {learnedness}, {learning}, {scholarship}, {encyclopaedism}]