Union-bug Definition
noun
(printing) A maker's mark showing that the work on which imprinted is sanctioned by members of a trade union. The mark often is a tiny elongated rhomboid containing and surrounded by, in miniscule typeface, identifying names and union's local chapter number.
Wiktionary
Other Word Forms of Union-bug
Noun
Singular:
union-bug
Plural:
union-bugs
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