Dictionary

The American Heritage Dictionary of the English Language, 4th edition, published by Houghton Mifflin Company
The American Heritage Dictionary provides clear and precise definitions along with an authoritative guide to usage. You can also check a word's spelling, syllabification and etymology, and hear an audio pronunciation.
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Title Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

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ad- (prefix)
Ada (programming language)
adagio (Vocal Music Band)
Adam (town, in the Bible)
Adam's apple (slight projection at the front of the throat)
Adam's-needle (stemless or nearly stemless plants)