thermoscope
n. வெப்ப வேறுபாடு காட்டி.
Ther"mo*scope, n. Etym: [Thermo- + -scope.] (Physics) Defn: An instrument for indicating changes of temperature without indicating the degree of heat by which it is affected; especially, an instrument contrived by Count Rumford which, as modified by Professor Leslie, was afterward called the differential thermometer.