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duplation

[doo-pley-shuh n, dyoo-]
noun
  1. multiplication by two; doubling.
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Origin of duplation

1375–1425; late Middle English < Latin duplātiōn-, stem of duplātiō a doubling, equivalent to duplāt(us) (dupl(us) duple + -ātus -ate1) + -iōn- -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018