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The American Heritage Dictionary, 4th Edition
The American Heritage Dictionary 4th Edition Author:Houghton Mifflin Company "Office Edition"
The Fourth Edition includes over 10,000 new words and senses, full etymologies, a revised Appendix of Indo-European Roots, and an all-new Appendix of Semitic Roots. It also includes an expansive note program: over 450 new and revised Usage Notes, 100 Regional Notes, and a new feature, Our Living Language Notes.