- 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
Word Origin and History for oro-
word-forming element meaning "mountain," from Greek oros "mountain" (see oread).
Online Etymology Dictionary, © 2010 Douglas Harper