ventage
/ˈvɛntɪdʒ/
noun
- An opening or passage that allows air, gas, or liquid to escape or enter; a vent.
- The designer added a small ventage near the top of the terrarium for airflow.
- The old castle had a narrow ventage in the wall to let smoke escape.
- He checked every ventage in the submarine to ensure no water could leak in.