Open English Wordnet
Nouns
(n)citation, cite, acknowledgment, credit, reference, mention, quotationa short note recognizing a source of information or of a quoted passage“the student's essay failed to list several important citations”, “the acknowledgments are usually printed at the front of a book”, “the article includes mention of similar clinical cases”
(n)reference point, point of reference, referencean indicator that orients you generally“it is used as a reference for comparing the heating and the electrical energy involved”
(n)reference book, reference, reference work, book of factsa book to which you can refer for authoritative facts“he contributed articles to the basic reference work on that topic”
(n)character, reference, character referencea formal recommendation by a former employer to a potential future employer describing the person's qualifications and dependability“requests for character references are all too often answered evasively”
(n)reference, denotation, extensionthe most direct or specific meaning of a word or expression; the class of objects that an expression refers to“the extension of ‘satellite of Mars’ is the set containing only Demos and Phobos”
(n)reference, consultationthe act of referring or consulting“reference to an encyclopedia produced the answer”
(n)address, computer address, reference(computer science) the code that identifies where a piece of information is stored