The MED contains over '15,000 pages [that] offer a comprehensive analysis of lexicon and usage for the period 1100-1500, based on the analysis of a collection of over three million citation slips.'
LEME searches and displays word-entries from monolingual English dictionaries, bilingual lexicons, technical vocabularies, and other encyclopedic-lexical works, 1480-1702.
The Merriam-Webster Online Dictionary is based on the print version of Merriam-Webster's Collegiate® Dictionary, Eleventh Edit. The online dictionary includes the main A-Z listing of the Collegiate Dictionary, as well as the Abbreviations, Foreign Words and Phrases, Biographical Names, and Geographical Names sections of that book