The Collaborative International Dictionary
Encyclopedical
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.]
Wiktionary
encyclopedical
a. (context American spelling English) (alternative spelling of encyclopaedical English)