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[kyoo r-ee, kyoo-ree] /ˈkyʊər i, kyʊˈri/
noun, Physics, Chemistry
a unit of activity of radioactive substances equivalent to 3.70 × 10 10 disintegrations per second: it is approximately the amount of activity produced by 1 gram of radium-226.
Abbreviation: Ci.
Origin of curie
1910; named in memory of Pierre Curie Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for curies


/ˈkjʊərɪ; -riː/
a unit of radioactivity that is equal to 3.7 × 1010 disintegrations per second Ci
Word Origin
C20: named after Pierre Curie


/ˈkjʊərɪ; -riː; French kyri/
Marie (mari). 1867–1934, French physicist and chemist, born in Poland: discovered with her husband Pierre the radioactivity of thorium, and discovered and isolated radium and polonium. She shared a Nobel prize for physics (1903) with her husband and Henri Becquerel, and was awarded a Nobel prize for chemistry (1911)
her husband, Pierre (pjɛr). 1859–1906, French physicist and chemist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for curies



"unit of radioactivity," 1910, named for Pierre Curie (1859-1906) or his wife, Marie (1867-1934), discoverers of radium.

Online Etymology Dictionary, © 2010 Douglas Harper
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curies in Medicine

curie cu·rie (kyur'ē, kyu-rē')
Abbr. Ci
A unit of radioactivity, equal to the amount of a radioactive isotope that decays at the rate of 3.7 × 1010 disintegrations per second.

Curie Cu·rie (kyur'ē, kyu-rē', kü-), Marie. Originally Manja Skłodowska.. 1867-1934.

Polish-born French chemist. She shared a 1903 Nobel Prize with her husband, Pierre Curie (1859-1906), and Henri Becquerel (1852-1908) for fundamental research on radioactivity. In 1911 she won a second Nobel Prize for her discovery and study of the elements radium and polonium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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curies in Science
  (kyr'ē, ky-rē')   
A unit used to measure the rate of radioactive decay. Radioactive decay is measured by the rate at which the atoms making up a radioactive substance are transformed into different atoms. One curie is equal to 37 billion (3.7 × 1010) of these transformations per second. Many scientists now measure radioactive decay in becquerels rather than curies.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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