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Find a word you don't understand while reading nytimes.com? Fear not, double click the word to get the definition, powered by these three entities:

1. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company.
2. Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 by Houghton Mifflin Company.
3. WordNet 1.7.1 Copyright © 2001 by Princeton University.