It's called a "porthole."
* porthole
A round window in the hull (originally any opening in the hull) is called a porthole. A window in the superstructure is a window.
devil's window
not opening a door the answer is hole
window
No, this shade is easy to install. It can be installed inside the window opening or outside (in front of) the window opening.
A window opening is simply one of those topics that is vital, and that takes experienced ministership about
a window
window 7 build 7601 this copy of window not genuine
minimise it
window
Window.