The American Heritage Dictionary of the English Language, Fourth Edition

This newly updated edition of America's favorite dictionary features
revised biographical and geographical entries as well as up-to-date
charts and tables for topics such as world currencies and chemical
elements. Among the 500 entries new to this update are Amber Alert,
blogosphere, gravitino, halo effect, hawala, lycopene, malware, micropolis,
proteome, Qi Gong, SARS, shout-out, speed dating, sudoku, Texas hold'em,
text message, and wiki.

The renowned American Heritage® Usage Panel, a group of more
than 200 distinguished writers, scholars, and scientists, offers advice on
problems of grammar and style; engaging notes explain word histories
and clarify differences among synonyms; thousands of quotations and
example sentences show words in context; and elegant definitions are
enhanced by 4,000 full-color photographs, drawings, and maps, making
this one of the most readable dictionaries available anywhere.

This dictionary can also be purchased with a fully loadable
Windows® / Mac® CD-ROM that contains the entire text of the
updated Fourth Edition, 68,000 audio pronunciations, 1,000 full-color
photographs and illustrations, and a college-level thesaurus with more
than 260,000 synonyms. The CD-ROM has spell-check capability and
can be used in conjunction with any Microsoft® Office application to get
definitions at the click of a mouse.