Thesaurus Linguae Latinae This link opens in a new window
"This is the largest dictionary of the Latin language encompassing the use of Latin from its origin to the 7th century A.D. The entries list every single known occurrence of Latin words together with precise citations. This is a unique and indispensable tool for scholars dealing with any subject that relates to the Latin language. I.e. Classics, History, Literature, Linguistics, French, Italian, Spanish (these languages - among a couple of others - originate from Latin). It is also a tool for even the life and biomedical sciences that use Latin vocabularies. The project that produced the print version of this source started at the end of the 19th century and is still going on; the planned completion will be in 2050. The online edition of the Thesaurus Linguae Latinae is published by De Gruyter and provides access to the contents of all lexicon articles published up to 2008 (that is the letters A-M, O, P-pomifer, porta-pulso), the articles in the Onomasticon volumes (letters C and D), the Index librorum and the Praemonenda de rationibus et usu operis, a multilingual introduction to the printed version of the Thesaurus. The content of TTL online is thus identical to that of the printed version of the Thesaurus. Each year the contents of the newly printed fascicles will be added to the database"