Porthole

n.

1.

(Naut.) An embrasure in a ship's side. See 3d Port.

Noun	1.	porthole - a window in a ship or airplane
	2.	porthole - an opening (in a wall or ship or armored vehicle) for firing through Synonyms: embrasure, port

air hole, armhole, bay, bay window, blowhole, bow window, bullet-hole, bunghole, casement, casement window, cringle, deadeye, eye, eyelet, fan window, fanlight, gasket, grille, grommet, guide, keyhole, knothole, lancet window, lantern, lattice, light, loop, loophole, louver window, manhole, mousehole, oriel, pane, peephole, picture window, pigeonhole, pinhole, placket, placket hole, port, punch-hole, rose window, skylight, spiracle, tap, transom, vent, venthole, wicket, window, window bay, window glass, windowpane