Orifice (noun)

1. An opening or hole in an object, typically used to allow the passage of air, liquids or solids.
2. A natural opening in the body, such as the mouth, nose or ear canal.

Origin:

The word "orifice" comes from the latin word "orificium" meaning "opening" or "mouth".

Examples:

1. The orifice at the top of the bottle allows air to enter as the liquid is poured out.
2. The orifice in the center of the valve controls the flow of water.
3. The human ear has three orifices: the outer ear, the middle ear and the inner ear.
4. The orifices in the walls of the stomach allow food to pass through to the small intestine.
5. The orifices in the skin are the openings of the sweat glands.