Hypertext Webster Gateway: "pyrometer"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Pyrometer \Py*rom"e*ter\, n. [Pyro- + -meter: cf. F.
pyrom[`e]tre.]
1. (Physics) An instrument used for measuring the expansion
of solid bodies by heat.
2. (Physics) An instrument for measuring degrees of heat
above those indicated by the mercurial thermometer.
Note: It is usually constructed so as to register the change
which the heat to be measured produces in the length of
some expansible substance, as a metallic rod, or in the
intensity of a thermo-electric current.
From WordNet (r) 1.7 (wn)
pyrometer
n : a thermometer designed to measure high temperatures
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