Relating to aerophilately, the collecting of stamps, envelopes, and other items related to air mail and aviation.
From aerophilately + -ic. This hobby terminology emerged in the early 20th century as air mail became a novelty worth collecting.
Aerophilatelic collectors hunt for the first air mail stamps and covers—they're preserving the history of how humans first trusted letters to airplanes instead of trains and ships.
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