On Wednesday, 2 November 2016 at 20:03:59 UTC, Meta wrote:
>
> I think there's an obvious reason as to why they're not called that.

I almost always see languages call it cumsum rather than cumulativeSum.

R - https://stat.ethz.ch/R-manual/R-devel/library/base/html/cumsum.html
Matlab - https://www.mathworks.com/help/matlab/ref/cumsum.html
Python - https://docs.scipy.org/doc/numpy/reference/generated/numpy.cumsum.html

The only exceptions I could find were languages that called it something else, like Accumulate in Mathematica or the scan functions noted in the cumulativeFold function doc.

In practice, I would probably just create an alias.