The correct term for an airplane window is a porthole, the same as for a window on the side of a ship.
Circular diameter is the distance from side to side of a circle through the middle.
A track is a circular ring on one side of the disk.
It has round windows which look like the portholes of an oceanliner. The building is constructed with a metal frame, and a curtain wall with round windows. The window shape contributes to the structural strength of the building. The circular design of the windows has earned the building the nickname, "The House of a Thousand Arseholes" - an anthropomorphic reference to the circular shape of the windows, of course, and not to the hard-working people manning it's luxurious offices.
If you aboard the ship and you face toward the front of the ship, the port side is the left side of the ship. So, the port side of a ship would show the port light.
The windows are similar by the Side-Side-Side Similarity Theorem.
...Is "aport": On a ship, while facing forward, the left side of the ship is called "port" and the right side of the ship is called "starboard".
Porthole
The left side of a ship or plane.
The right side of a ship is called the star-board side.
so that people cant fit there head there
The word starboard comes from Old English steorbord, which means the side from which the ship is steered. Earlier before ships had rudder on their center line to steer them they were steered using the rows. Most of the rowers were right handed, so it was common for the ships to have bigger oars on its right side to assist in steering the ship. So naturally the right side of the ship was called steorbord side of the ship. The ship would naturally berthed on the left side to avoid damage to the large oars on the right side. Earlier the left side of the ship used to be called larboard side, but it was easy to get confused in high winds between starboard and larboard. So larboard side was replaced by port side. In short the right side of the ship is called the STARBOARD SIDE and the left side of the ship is called PORT SIDE.