From Wiktionary, the free dictionary
Noun: (science fiction) a vehicle like an airplane for travel through an atmosphere that may not be composed of air
[edit]1961, Leigh Brackett, The Nemesis from Terra[1], New York: Ace, page 86:Get volunteers to take up what 'copters and atmoplanes there are in this dump and clean out the Bannings by the gates.
2015 October 9, Athena Grayson, The Chase: Huntress of the Star Empire Part One[2], Uncharted Worlds Media:The clang of the hatch of the atmo-plane closing confirmed her suspicion.
