Huh? How does that make it not an encyclopaedia? (Or am I having an attack of Not Getting The Joke now?)

OED's most relevant definition of "encyclopaedia" seems to be "An elaborate and exhaustive repertory of information on all the branches of some particular art or department of knowledge; esp. one arranged in alphabetical order." Admittedly, this may be seen as more obviously true of Wikipedia if we accept "fandom and teh internets" as a "department of knowledge"...