accumulation

[uh-kyoo-myuh-ley-shuh n] /əˌkyu myəˈleɪ ʃən/
noun
1.
act or state of accumulating; state of being accumulated.
2.
that which is accumulated; an accumulated amount, number, or mass.
3.
growth by continuous additions, as of interest to principal.
Origin
1480-90; < Latin accumulātiōn- (stem of accumulātiō). See accumulate, -ion
Related forms
nonaccumulation, noun
overaccumulation, noun
preaccumulation, noun
reaccumulation, noun
superaccumulation, noun
British Dictionary definitions for accumulation

accumulation

/əˌkjuːmjʊˈleɪʃən/
noun
1.
the act or process of collecting together or becoming collected
2.
something that has been collected, gathered, heaped, etc
3.
(finance)
  1. the continuous growth of capital by retention of interest or earnings
  2. (in computing the yield on a bond purchased at a discount) the amount that is added to each yield to bring the cost of the bond into equality with its par value over its life Compare amortization (sense 2)
4.
the taking of a first and an advanced university degree simultaneously
Word Origin and History for accumulation
n.

late 15c., from Latin accumulationem (nominative accumulatio) "a heaping up," noun of action from past participle stem of accumulare "to heap up, amass," from ad- "in addition" (see ad-) + cumulare "heap up," from cumulus "heap" (see cumulus).