Merriam Webster Online Dictionary and Thesaurus is based on the print version of Merriam-Webster's Collegiate® Dictionary, Tenth Edition. The on-line 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. It also includes 1,000 illustrations and 25 tables. Selected sections of the print Collegiate® Dictionary, notably the Signs and Symbols section, are omitted from the on-line Collegiate Dictionary because they include special characters and symbols that cannot readily be reproduced in HTML.