The Collaborative International Dictionary of English v.0.48:

Encyclopedic \En*cy`clo*ped"ic\, Encyclopedical
\En*cy`clo*ped"ic*al\, a. [Cf. F. encyclop['e]dique.]
   Pertaining to, or of the nature of, an encyclopedia; broad in
   scope or content; embracing a wide range of subjects; as, a
   person having encyclopedic knowledge of a subject. [Also
   spelled encyclopaedic.]
   [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

encyclopaedic
    adj 1: broad in scope or content; "encyclopedic knowledge" [syn:
           encyclopedic, encyclopaedic]