Origin of oro-; from Classical Greek oros, mountain: see orient
Origin of oro-Greek, from oros, mountain.
- Forming compound terms with the sense of mouth.
- Forming compound terms relating to mountains.
From combining form of Ancient Greek á½„ÏÎ¿Ï‚ (oros, “mountain, high ground"), from á½€ÏÎÏƒÎ¸Î±Î¹ (oresthai, “to raise oneself").