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alpha ray

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noun Physics.
  1. a stream of alpha particles.
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Origin of alpha ray

First recorded in 1900–05
Also called alpha radiation.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for alpha ray

alpha ray

noun
  1. ionizing radiation consisting of a stream of alpha particles
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
alpha ray in Medicine

alpha ray

n.
  1. A stream of alpha particles or a single high-speed alpha particle.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
alpha ray in Science

alpha ray

  1. A stream of alpha particles.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.