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Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A stream of alpha particles.

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

  • n. the radiation of alpha particles during radioactive decay

Etymologies

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