Encyclopedical :: Encyclopedical (a.) Pertaining to, or of the nature of, an encyclopedia; embracing a wide range of subjects..
Encyclopedism :: Encyclopedism (n.) The art of writing or compiling encyclopedias; also, possession of the whole range of knowledge; encyclopedic learning..
Encyclopedist :: Encyclopedist (n.) The compiler of an encyclopedia, or one who assists in such compilation; also, one whose knowledge embraces the whole range of the sciences..