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benzo-

1.
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:
benzocaine.
Also, especially before a vowel, benz-.
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for benzo-

benzo-

combining form
1.
indicating a benzene ring fused to another ring in a polycyclic compound: benzofuran
2.
indicating derivation from benzene or benzoic acid or the presence of phenyl groups: benzophenone
Word Origin
from benzoin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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benzo- in Medicine

benzo- or benz-
pref.
Benzene; benzoic acid: benzodiazepine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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