A telegram or message about cattle or livestock matters sent during the era when telegrams were common.
Compound of 'cow' plus 'gram' (short for 'telegram', from Greek 'gramma' meaning written message). This appears to be a specialized or humorous term from the telegraph era.
Cowgram is a fascinating relic word—it's how ranchers communicated cattle news over wires before phones became common, showing how technology got absorbed into rural vocabulary.
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