The proper name of just subtracting the mean? https://en.wikipedia.org/wiki/Normalization_(statistics)
Normalization is subtracting the mean then dividing by the standard deviation. What is the name of just subtracting the mean?

Answered in comments: I agree with COOLSerdash that mean centering is the best term for this. Nick Cox is right that subtracting the mean clearly explains things, but the former is used more commonly in other grammatical forms. E.g. mean-centered data is a more commonly used term than mean-subtracted data.
I personally don't like de-meaning because it's too close in spelling and pronunciation to the existing (and completely different) word 'demeaning'.
