A fire suppression terminal has the purpose of delivering a fluid (gas or liquid) that will suppress a fire. A fire suppression terminal provides for all forms of sprinkler, spreader and other form of terminal that is connected to a pipework system and intended to act in the role of suppressing a fire.
A fire sprinkler deflector is a fire suppression terminal attached to a sprinkler to deflect the water flow into a spread pattern to cover the required area.