One of the mysteries of the English language finally explained.
Any of several multiple copies, especially one reprographically produced. Also (in plural or attributive): a (large) number of copies of a book, record, etc.
1Generally. That produces or involves multiple copies.
2Cell Biology. Designating or relating to a plasmid, gene, or other nucleic acid sequence present in multiple copies in a cell or genome.
1940s; earliest use found in American Historical Review. From multi- + copy.
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