Here you will find one or more explanations in English for the word Pyroscope.
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Pyroscope
Pyroscope Pyr"o*scope, n. [Pyro- + -scope: cf. F. 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.]
Meaning of Pyroscope from wikipedia