A lightweight postal letter or message designed to be photographed and transmitted by air, especially used during World War II.
Compound of 'air' and 'graph' (from Greek 'graphia,' meaning writing). The airgraph was a British wartime innovation to reduce mail weight on planes.
Soldiers in WWII could send tiny airgraph letters that were photographed and microfiche'd so 50 letters weighed almost nothing—a genius hack that saved plane space for ammunition.
Complete word intelligence in one call. Free tier — 50 lookups/day.