"reduced form" means simplifying or condensing something to its basic or essential elements. It refers to presenting or representing something in a more simplified or concise manner, removing unnecessary details or complexities. Full definition
If you don't like risk, you'll probably sleep easier by reducing all forms of debt. (hoyes.com)
This will eliminate the need for the bezels, thus reducing the form factor of the phone while at the same time keeping the same screen sizes. (nashvillechatterclass.com)
As organisms adapt to their environment, they lose traits that are no longer beneficial or keep them in much reduced form. (science.sciencemag.org)