alpha-radiation

alpha ray

noun Physics.
a stream of alpha particles.
Also called alpha radiation.

Origin:
1900–05

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
alpha ray
 
—n
ionizing radiation consisting of a stream of alpha particles

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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a fool or simpleton; ninny.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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American Heritage
Medical Dictionary

alpha ray n.
A stream of alpha particles or a single high-speed alpha particle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
alpha ray  
A stream of alpha particles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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