Genre terms : a thesaurus for use in rare book and special collections cataloging, via WWW, July 29, 2014 (Encyclopedias. BT Wordbooks)

Art & architecture thesaurus online, July 29, 2014 (encyclopedias. UF cyclopedias; encyclopaedias. Books, set of books, or disks, containing informational articles on subjects in every field of knowledge, or limited to a special field or subject, usually arranged in alphabetical order.)

Reitz, J.M. ODLIS : online dictionary for library and information science, July 29, 2014 (encyclopedia: A book or numbered set of books containing authoritative summary information about a variety of topics in the form of short essays, usually arranged alphabetically by headword or classified in some manner. An entry may be signed or unsigned, with or without illustration or a list of references for further reading. Headwords and text are usually revised periodically for publication in a new edition. In a multivolume encyclopedia, any indexes are usually located at the end of the last volume. Encyclopedias may be general or specialized, usually by subject or discipline. Also spelled encyclopaedia. Synonymous with cyclopedia.)

Görlach, M. An alphabetical list of English text types, in Text types and the history of English, c2004: p. 41 (encyclopedia: book containing information on all branches of knowledge, arranged alphabetically)

Wikipedia, July 29, 2014 (Cyclopedia, cyclopaedia or cyclopædia is an archaic term for encyclopedia; An encyclopedia (also spelled encyclopaedia or encyclopædia) is a type of reference work or compendium holding a comprehensive summary of information from either all branches of knowledge or a particular branch of knowledge. Encyclopedias are divided into articles or entries, which are usually accessed alphabetically by article name. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, unlike dictionary entries, which focus on linguistic information about words, encyclopedia articles focus on factual information to cover the thing or concept for which the article name stands.)

Wiktionary, July 29, 2014 (encyclopedia (plural encyclopedias or encyclopediae or encyclopediæ); cyclopedia: Alternative spelling of cyclopaedia; cyclopaedia (plural cyclopaedias))