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crookes

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Crookes

[krooks]
–noun
Sir William, 1832–1919, English chemist and physicist: discovered the element thallium and the cathode ray.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Crookes   (krŏŏks)   
British chemist and physicist who discovered thallium (1861), invented the radiometer (1875), and studied cathode rays.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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