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cumulation

[kyoo-myuh-ley-shuh n]
noun
  1. the act of cumulating; accumulation.
  2. a heap; mass.
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Origin of cumulation

First recorded in 1610–20; cumulate + -ion
Related formsde·cu·mu·la·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for decumulation

cumulation

n.

1610s, noun of action from cumulate.

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Online Etymology Dictionary, © 2010 Douglas Harper