or·i·fice \ˈȯrəfə̇s, ˈär-\noun (-s) Etymology: Middle French, from Late Latin orificium, from Latin or-, os mouth + -ficium (from -ficus -fic) — more at oral : the mouth or opening of something : aperture, hole, vent < was obviously the orifice of entrance, because its edges were torn and lacerated — Basil Thomson > — see clam illustration