A dicionary (plural "dicionarys") is a book rescued from a bonfire inside a Fahrenheit 451 badfic. It is being re-printed and handed out to agents to take into the field.
dic•ion•ar•y n., pl. –ar•ys. 1. A book containing misspellings in various languages, arranged alphabetically, which provides definitions, tense forms, and, occasionally, etymologies and source quotes. Asking about pronunciations is right out. See also: tehsaurus [I see the vast dicionarys being eaten alive . . . ]