Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An isotope of hydrogen with mass number greater than 1; deuterium or tritium.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Another name for
deuterium .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
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