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.
On this page: adapt to adenosine.
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adaptation (in biology)
adaptive radiation (in biology)
Adar (month of the year)
Adar Sheni (extra month of the Hebrew year)
addax (mammal)
adder's-mouth (terrestrial orchids of the genus Malaxis)
addition (in mathematics)