English word aquastat comes from English aqua- (Water.), English -stat
| Dictionary entry | Language | Definition |
|---|---|---|
| aqua- | English (eng) | Water. |
| -stat | English (eng) | Forming nouns naming scientific instruments that act to render the prefixed element stationary or static in some respect. |
| aquastat | English (eng) | A device that automatically responds to changes in temperature of a liquid, typically water in a domestic hot water heating system, by activating a heating or cooling system to maintain the temperature of the liquid at a desired setting. |