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  1. an apparatus for measuring high temperatures that uses the radiation emitted by a hot body as a basis for measurement.

Origin of pyrometer

First recorded in 1740–50; pyro- + -meter
Related formspy·ro·met·ric [pahy-ruh-me-trik] /ˌpaɪ rəˈmɛ trɪk/, py·ro·met·ri·cal, adjectivepy·ro·met·ri·cal·ly, adverbpy·rom·e·try, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for pyrometry


  1. an instrument for measuring high temperatures, esp by measuring the brightness (optical pyrometer) or total quantity (radiation pyrometer) of the radiation produced by the source. Other types include the resistance thermometer and the thermocouple
Derived Formspyrometric (ˌpaɪrəʊˈmɛtrɪk) or pyrometrical, adjectivepyrometrically, adverbpyrometry, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012