[pahyuh r-hee-lee-om-i-ter, pir-]

Origin of pyrheliometer

First recorded in 1860–65; pyr- + helio- + -meter
Related formspyr·he·li·o·met·ric [pahyuh r-hee-lee-uh-me-trik, pir-] /ˌpaɪər hi li əˈmɛ trɪk, ˌpɪr-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pyrheliometer


  1. an instrument for measuring the intensity of the sun's radiant energy
Derived Formspyrheliometric (pəˌhiːlɪəʊˈmɛtrɪk), adjective
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

pyrheliometer in Science


  1. An instrument used to measure the total amount of radiation from the Sun that hits a surface. It works by converting the Sun's heat into a voltage that is then recorded by a voltmeter.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.