"Reduction" is a word that means making something smaller, simpler, or fewer. It is the act of decreasing the size, amount, or complexity of something. Full definition
There is some research pointing to higher protein diets having modest benefits in reductions in weight (over standard low - fat diets). (freedieting.com)
Drivers interested in insurance reduction courses will find the cost of this type of course to be lower in price. (dmv.com)
We assumed costs would be coming down over time, but what's actually happened has greatly exceeded the rate of reduction of costs that we built into the model. (theconversation.com)