therm.o.stat H5WV:7mE7stAt, $5WV:r- n [C] a device which keeps a system within a usually limited temperature range by automatically switching the supply of heat on and off 温度自动调节器，恒温器 a central heating thermostat 中央空调温度调节器 an oven thermostat 烤箱温度自动调节器