• (n.) An instrument for measuring the intensity of heat radiating from a fire, or the cooling influence of bodies. It is a differential thermometer, having one bulb coated with gold or silver leaf. Found on http://thinkexist.com/dictionary/meaning/pyroscope/
Pyr'o·scope noun [ Pyro- + - scope : confer French pyroscope .] (Physics) An instrument for measuring the intensity of heat radiating from a fire, or the cooling influence of bodies. It is a differential thermometer, having one bulb coated with gold or silver leaf. [ R.] Found on http://www.encyclo.co.uk/webster/P/205