from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An early type of nuclear reactor whose core consisted of alternating layers of uranium pellets and graphite bricks, designed to create a sustained fission reaction.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics an early
nuclear reactorfuelled by uraniumand moderatedwith graphite
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a nuclear reactor that uses controlled nuclear fission to generate energy
from Wiktionary, Creative Commons Attribution/Share-Alike License
atomic + Italian pila, battery
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