from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An electron ejected from matter by ionizing radiation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An electron ejected by recoil when a rapidly moving alpha particle or other charged particle passes through matter.
- n. A secondary ionizing particle ejected by recoil when a primary particle passes through matter.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an electron ejected from matter by ionizing radiation
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