ther|mo|reg|u|la|tor «THUR moh REHG yuh LAY tuhr», noun.
1. an internal mechanism that regulates body temperature: »
Our juncos, chickadees, and kinglets appear to use different thermoregulators than the ones…in the Sudan (New Scientist).
2. any device, such as a thermostat, that regulates temperature.
Useful english dictionary. 2012.