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oxy-(word root) sharp, keen, acid
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
Oxygen, especially additional oxygen: oxyacetylene.
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.
(Elements & Compounds) denoting something sharp; acute: oxytone.
[from Greek, from oxus]
1. containing or using oxygen: oxyacetylene.
2. a former equivalent of hydroxy-
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form meaning “sharp,” “acute,” “keen,” “pointed,” “acid”: oxygen; oxymoron.
[< Greek, comb. form of oxýs sharp, keen]
a combining form representing oxygen in compound words, sometimes as an equivalent of hydroxy-: oxyhemoglobin.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.