How they define "cold fusion" temperature, if we look previous lab fusion experiments they all had very narrow point of fusion, welding arc has temperature of 1

How they define "cold fusion" temperature, if we look previous lab fusion experiments they all had very narrow point of fusion, welding arc has temperature of 10000 F withing few millimetre, that is what most of those previous so called cold fusion experiments did. But in reality fusion should occur at 100 million K. Cold fusion is refereed as room temperature, is there some trick in defining room temperature?