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alpha ray

noun Physics.

a stream of alpha particles.

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. 2019

British Dictionary definitions for alpha ray

alpha ray

noun

ionizing radiation consisting of a stream of alpha particles

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.

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.

alpha ray in Science

alpha ray

A stream of alpha particles.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.