porthole

Plural: portholes

Noun

• A small, round window in the side of a ship or aircraft.
• a window in a ship or airplane
• an opening (in a wall or ship or armored vehicle) for firing through
• A gunport; an opening in the hull of a ship through which cannon are fired.
• A circular window set in the hull of a ship.

Examples

• Through the porthole of his mind, he saw the perfect word forming.

Synonyms

embrasure, port, bullseye, scuttle