pyrometric-cone

pyrometric cone

noun
(in a kiln) a triangular piece of material that indicates by bending or melting that a certain temperature has been reached.

Origin:
1945–50

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
pyrometric cone

noun
a pyrometer consisting of a series of cones that melt at different temperatures 
WordNet® 3.0, © 2006 by Princeton University.
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