A prefix meaning 'heat' or 'temperature', used in terms such as 'thermometer' and 'thermodynamics'.
Example: The term 'thermoplastic' refers to a type of plastic that becomes pliable or moldable at a certain elevated temperature.
Enter Thermoman.
I should point out that Thermo Boy is just past the 85-degree mark, which is the point that he would be in a stupor and immobile.