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summable

[suhm-uh-buh l]
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adjective Mathematics.
  1. capable of being added.
  2. (of an infinite series, especially a divergent one) capable of having a sum assigned to it by a method other than the usual one of taking the limit of successive partial sums.
  3. (of a function) possessing a finite Lebesgue integral.
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Origin of summable

First recorded in 1775–85; sum + -able
Related formssum·ma·bil·i·ty, nounun·sum·ma·ble, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018