ther·mo·stat
noun/ˈθɜːməstæt/
/ˈθɜːrməstæt/
- a device that measures and controls the temperature of a machine or room, by switching the heating or cooling system on and off as necessary
Topics Engineeringc2, Houses and homesc2温控器;恒温器 Word Originmid 19th cent.: from thermo- ‘of heat’ + -stat.