thermopiles

thermopile

[thur-muh-pahyl]
noun Physics.
a device consisting of a number of thermocouples joined in series, used for generating thermoelectric current or for detecting and measuring radiant energy, as from a star.

Origin:
1840–50; thermo- + pile1

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Collins
World English Dictionary
thermopile (ˈθɜːməʊˌpaɪl)
 
n
an instrument for detecting and measuring heat radiation or for generating a thermoelectric current. It consists of a number of thermocouple junctions, usually joined together in series
 
[C19: from thermo- + pile1 (in the sense: voltaic pile)]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
thermopile   (thûr'mə-pīl')  Pronunciation Key 
A device consisting of a number of thermocouples connected in series or parallel, used for measuring temperature or generating current.
The American Heritage® Science Dictionary
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