pyrophotometer

 [pahy-roh-foh-tom-i-ter]  

py·ro·pho·tom·e·ter

   [pahy-roh-foh-tom-i-ter]
noun Physics.
a form of pyrometer that measures temperature by optical or photometric means.
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Origin:
pyro- + photometer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pyrophotometer is always a great word to know.
So is fluidity. Does it mean:
the ability of a substance to flow; a measure of this ability, the reciprocal of the coefficient of viscosity
the reciprocal of the bulk modulus, equal to the ratio of the fractional change in volume to the stress applied to a body
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Collins
World English Dictionary
pyrophotometer (ˌpaɪrəʊfəʊˈtɒmɪtə)
 
—n
a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits
 
pyropho'tometry
 
—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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