Middle English Dictionary
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Read more: Middle English DictionaryA comprehensive analysis of lexicon and usage of Middle English for the period 1100-1500, based on the analysis of a collection of over three million citation slips
American Heritage Book of English Usage
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Read more: American Heritage Book of English UsageA detailed look at grammar, style, diction, word formation, gender, social groups and scientific forms, provided by Bartleby.com.
American Heritage Dictionary, 4th ed.
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Read more: American Heritage Dictionary, 4th ed.Over 90,000 entries feature 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, language notes and word-root appendixes, provided by Bartleby.com.