Cell comments and displaying info when hovering the cursor over a cell

I'm currently working on a spreadsheet that requires the used of codes and abbreviations, using initial instead of people's names is one of the examples from the spreadsheet, my current fix is to have a comment attached to the column header with a large list of the abbreviations and their meaning, which is proving difficult as I add more to it.

I was wondering if there was a way to have the relevant meaning to the abbreviation show when the cursor is moved over the cell?

Cheers