Full record for porthole n.

Definition	a porthole in a spacecraft or aircraft
OED requirements	antedating 1925
Earliest cite	W. Elwyn Backus 'The Waning of a World'
Comment	Jeff Prucher submitted a 1931 cite from Gawain Edwards "The Return to Jupiter". Alistair Durie submitted a 1925 cite from W Elwyn Backus's "The waning of a world". Earliest cite in the OED: 1956.
Last modified	6 July, 2008

Citations for porthole n.

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1931 ‘G. Edwards’ Return from Jupiter in Wonder Stories Mar. 1062/2	It was a space-car, long, swift, gleaming in the pale light of the distant sun like a cartridge of stainless steel. On either side was a row of round portholes through which the occupants could look out into space.
1931 ‘G. Edwards’ Return from Jupiter in Wonder Stories Mar. 1062/2	On either side was a row of round portholes through which the occupants could look out into space.