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Benzene; benzoic acid: benzophenone.
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.
benzo-or sometimes before a vowel
1. (Elements & Compounds) indicating a benzene ring fused to another ring in a polycyclic compound: benzofuran.
2. (Elements & Compounds) indicating derivation from benzene or benzoic acid or the presence of phenyl groups: benzophenone.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form used in the names of chemical compounds in which benzene, benzoic acid, or one or more of the phenyl groups is present: benzophenone. Also, esp. before a vowel, benz-.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.