Lexikon

Etymology
Ultimately from, from

Noun

 * 1) reference book; a book, usually alphabetically ordered, in which definitions and facts can be looked up, such as an encyclopaedia, dictionary, etc.
 * 2) a lexicon, in other words the vocabulary of a language, field, or individual person.
 * 1) a lexicon, in other words the vocabulary of a language, field, or individual person.

Usage notes

 * The plural forms and  are sometimes found, but are nonstandard and rather rare.
 * The use of this word for a dictionary specifically, as in, is considered dated by some authorities including Duden. However, the inclusion of dictionaries in the broader term can hardly be considered dated.

Hyponyms