porthole

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porthole

a small aperture in the side of a vessel to admit light and air, usually fitted with a watertight glass or metal cover, or both

Porthole

A small window, usually circular, in a ship’s side, or on an exterior part of a structure.

Porthole

 

a glass window in the hull or superstructure of a vessel for illuminating and ventilating interior spaces. Ship portholes may be round (side portholes and deck-cabin portholes) or rectangular (deck-cabin portholes) and may be deadlights or of the opening type, often with waterproof covers. Selection of the type of porthole is determined by the place where it is to be installed and the distance to the waterline. The round windows of underwater research vessels, airplanes, helicopters, and spaceships are also called portholes.

porthole

[′port‚hōl]
(design engineering)
The opening or passageway connecting the inside of a bit or core barrel to the outside and through which the circulating medium is discharged.
(engineering)
A circular opening in the side of a ship or airplane, usually serving as a window and containing one or more panes of glass.

access door

access door
A door, usually small, which is provided through a finished construction, as into a duct, through a ceiling, behind a wall, in a large piece of mechanical equipment, etc.; used to provide a means of inspection of equipment or services housed within.
References in periodicals archive ?
Freezing a porthole not only hides objects behind it, but it also offers a more finished look.
To fussy-cut the porthole panel print, cut a 7 1/2" square of see-through template plastic; place template on fabric, centering porthole.
He walks around and looks through the opposite porthole.
The portholes are made from paper plates, with goldfish crackers glued on to resemble swimming fish.
Last year, two of the square portholes recovered by divers were declared to the Receiver of Wrecks under a general amnesty.
Pupils Lee Cluley (left) and Barke Ali look through a porthole.
Outer louvers direct breezes, and along with the shiny beige exterior and the blue-tinted portholes, also deflect sunlight.
To build off of Buick's heritage, stylists incorporate portholes on the front quarter panel, with three holes on each side designating V6 equipped cars and four holes signifying V8 powered models.
Portholes of clear and dark blue glass are set into metre-wide doors with openings for cross-ventilation.
WDS Indexable Drills are offered in a new design with side coolant portholes, and diameters up to 2.
Of particular concern to McClain was the strength of the hull area around two portholes.
Portholes, after all, add an amusing yet architectural edge to a room and can be used instead of a small window or to perforate a room or cupboard door.