Daily Almanac for
Nov 30, 2009
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al'pha par"ticle



Physics.
a positively charged particle consisting of two protons and two neutrons, emitted in radioactive decay or nuclear fission; the nucleus of a helium atom.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

alphanumericalpha privative
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