sulfinyl
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sul·fi·nyl
(sŭl′fə-nĭl′)n.
The bivalent group SO. Also called thionyl.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sul•fi•nyl
(ˈsʌl fə nɪl)n.
the bivalent functional group SO.
[1930–35]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.