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union bug


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union bug (plural union bugs)

  1. (printing) A maker's mark imprinted on a work to show that it is sanctioned by members of a trade union. It is often a tiny elongated rhomboid containing and surrounded by, in miniscule typeface, identifying names and the union's local chapter number.
    • Printed matter circulated by the (US) Democratic Party inevitably displays a union bug.

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