- a combining form meaning “mountain,” used in the formation of compound words: orography.
Origin of oro-1
< Greek, combining form of óros
- a combining form meaning “mouth,” used in the formation of compound words: oropharynx.
Origin of oro-2
combining form representing Latin ōs, stem ōr-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- mountainorogeny; orography
from Greek oros
- oral; mouthoromaxillary
from Latin, from ōs
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
Word Origin and History for oro-
word-forming element meaning "mountain," from Greek oros "mountain" (see oread).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.