from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A substance that chemically reduces other substances, especially by donating one or more electrons.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) a substance that causes reduction of another substance in a chemical reaction, as by donating electrons or adding hydrogen atoms.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry Any
substancethat reduces, or donates electronsto, another; in so doing, it becomes oxidized.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver
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