petr-
Also found in: Medical.
petr-
pref.
Variant of petro-.
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.
petr-
prefix
1. (Geological Science) (before a vowel) a spelling variant of petro-
2. (before a vowel) a spelling variant of petro-
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014