from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of a class of organic chemical compounds containing a ring composed of one sulfur atom, one nitrogen atom, and four carbon atoms, used in making dyes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A six-membered heterocycle containing four carbon atoms, one nitrogen and one sulfur atom, and two double bonds; many of its derivatives have important applications
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a compound made up of a ring of four carbon atoms and one sulfur atom and one nitrogen atom
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