Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A rapidly moving alpha particle.
  • noun A narrow beam of such particles.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A stream of alpha particles.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the radiation of alpha particles during radioactive decay

Etymologies

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