You can add links to all Greek words in the TLG by choosing from the left-hand list (once you have found a Greek text) "TLG Links" or "Perseus." Each word will then link to published lexica (LSJ and others) in the TLG or out on the Perseus website.
Latin Dictionaries
Database of Latin Dictionaries
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Several modern and medieval dictionaries of ancient, medieval, late, and ecclesiastical Latin that can be searched separately or together.