A pin or fastener, particularly one used in musical instruments or mechanical devices; sometimes a decorative harping pin.
Compound of 'harp' or 'harper' with 'pin,' or potentially from 'harpoon' derivatives. The term appears in specialized musical and mechanical contexts.
Harpin emerges as a technical term in harp manufacturing—the tuning pins that hold harp strings are critical to the instrument's sound, and master luthiers spend years perfecting their harpin designs.
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