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  2. Comparison of English dictionaries - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_English...

    Cambridge Advanced Learner's Dictionary: Cambridge University Press: 2003 [3] 4th (ISBN 9781107619500) 2013 (24.06) 1,856 140,000 British: Collins COBUILD Advanced Dictionary: Collins Cobuild: 1987 10th (ISBN 978-0008444907) 2023 (13.04) 1,920 British: Longman Dictionary of Contemporary English: Pearson-Longman: 1978 6th (ISBN 9781447954194 ...

  3. Cambridge Advanced Learner's Dictionary - Wikipedia

    en.wikipedia.org/wiki/Cambridge_Advanced_Learner...

    The Cambridge Advanced Learner's Dictionary (abbreviated CALD) is a British dictionary of the English language. It was first published in 1995 under the title Cambridge International Dictionary of English by the Cambridge University Press. The dictionary has over 140,000 words, phrases, and meanings. It is suitable for learners at CEF levels B2 ...

  4. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    simple harmonic motion simple machine A mechanical device that changes the direction or magnitude of a force. In general, a set of six classical simple machines identified by Renaissance scientists drawing from Greek texts on technology are collectively defined as the simplest mechanisms that can provide mechanical advantage (also called leverage).

  5. Clarke's three laws - Wikipedia

    en.wikipedia.org/wiki/Clarke's_three_laws

    The second law is offered as a simple observation in the same essay but its status as Clarke's second law was conferred by others. It was initially a derivative of the first law and formally became Clarke's second law where the author proposed the third law in the 1973 revision of Profiles of the Future , which included an acknowledgement. [ 4 ]

  6. Glossary of mathematical jargon - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    In applied fields the word "tight" is often used with the same meaning. [2] smooth Smoothness is a concept which mathematics has endowed with many meanings, from simple differentiability to infinite differentiability to analyticity, and still others which are more complicated. Each such usage attempts to invoke the physically intuitive notion ...

  7. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    The word "parsec" is a portmanteau of the words parallax and second. partial solar eclipse peak magnitude For a variable star, this is the highest amplitude achieved during a rise in luminosity, followed by a decline. This data point can provide useful distance information for a cataclysmic variable.

  8. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  9. Glossary of biology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_biology

    This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...