from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any of the participants present at the start of a chemical reaction
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a chemical substance that is present at the start of a chemical reaction
Sorry, no etymologies found.