Definition of "pyrheliometer" []

• Any of various devices that measure all the intensity of solar radiation received at the earth. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "However, instead of the much more accurate pyrheliometric ratioing method used by Hoyt et al., they used direct pyrheliometer readings."
• "Using pyrheliometer data, the authors of the paper"
• "And what exact frequencies does a pyrheliometer measure?"