Often referred to as the "support level".
If the price of a stock falls towards a support level it is a test for the stock: the support will either be reconfirmed or wiped out. It will be reconfirmed if a lot of buyers move into the stock, causing it to rise and move away from the support level. It will be wiped out if buyers will not enter the stock and the stock falls below the support.
Investment dictionary. Academic. 2012.