100 Science Words Every College Graduate Should Know HOW TO USE THE DICTIONARY To look up an entry in The American Heritage Dictionary of the English Language, use the search window above. For best results, after typing in the word, click on the “Search” button instead of using the “enter” key. Some compound words (like bus rapid transit, dog whistle, or identity theft) don’t appear on the drop-down list when you type them in the search bar. For best results with compound words, place a quotation mark before the compound word in the search window. guide to the dictionary THE USAGE PANEL The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. Annual surveys have gauged the acceptability of particular usages and grammatical constructions. The Panelists NEED HELP SOLVING A CROSSWORD PUZZLE? Go to our Crossword Puzzle Solver and type in the letters that you know, and the Solver will produce a list of possible solutions. -- AMERICAN HERITAGE DICTIONARY APP The new American Heritage Dictionary app is now available for iOS and Android. THE AMERICAN HERITAGE DICTIONARY BLOG The articles in our blog examine new words, revised definitions, interesting images from the fifth edition, discussions of usage, and more. OPEN DICTIONARY PROJECT Share your ideas for new words and new meanings of old words! Start Sharing Now! -- See word lists from the best-selling 100 Words Series! Find out more! INTERESTED IN DICTIONARIES? Check out the Dictionary Society of North America at http://www.dictionarysociety.com How do bats "see" in the dark? Why do ocean waves break parallel to the shore, no matter what direction they come from? What is the psychiatric disorder whereby people feign illness in order to gain medical attention? How do online stores keep credit card numbers secret from hackers? The latest title in the best-selling 100 Words series, 100 Science Words Every College Graduate Should Know (Houghton Mifflin, April 5, 2006), provides simple answers to these and dozens of other questions about the fundamental concepts of science and technology. Almost every day there are new facts and ideas discussed in the media about the makeup of the universe, the roles genes play in disease, the dangers of sweeping environmental change, and countless other things. People who are unfamiliar with the key words of science may not be able to fathom the rapid advances and developments taking place around them — even when they hit close to home. Are you up to the challenge? Find out by reading 100 Science Words Every College Graduate Should Know, by the Editors of the American Heritage® Dictionaries. A wide variety of new and established terms are discussed, including absolute zero, anaphylaxis, cryptography, echolocation, game theory, Kuiper belt, mitochondrion, Munchausen syndrome, quantum mechanics, and refraction. Each term is defined in clear, nontechnical language, with examples showing the importance of the word both in its field and in daily life. This book will appeal not only to college graduates, but to anyone with an interest in scientific concepts and the latest breakthroughs in the news. The following is the entire list of 100 words: absolute zero agoraphobia alga algorithm allele alternating current amygdala anaphylaxis angiogenesis apoptosis archaeon artesian well ATP bandwidth Beringia big bang black hole Brownian motion Cambrian Explosion capacitor carbon sequestration centripetal force chemosynthesis cognitive dissonance complementarity cryptography cyanobacterium cyclone dendrochronology echolocation endorphin estivation eutrophication Fibonacci sequence fission fundamental force game theory genome gluon heliocentrism histone hominin hypha imaginary number interferon ischemia isomer junk DNA krill KT boundary Kuiper belt kwashiorkor logic gate magnetosphere megabyte melanoma mitochondrion monotreme monsoon Munchausen syndrome nanotube Neanderthal nosocomial infection obligate orbital pahoehoe Pavlovian phenotype pheromone photoelectric photon piezoelectric effect placebo prion prophylaxis protein folding protolanguage quantum mechanics radiometric dating rain shadow refraction REM sleep retrovirus roentgenium sex sociobiology solar wind superposition telomere teratogen theory tidal force time dilation Universal Time urea vestigial wave function xerophyte yolk zero Indo-European & Semitic Roots Appendices Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices: Indo-European Roots Semitic Roots The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots. 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