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Pronunciation varies by accent · noun
A device that measures the intensity of solar radiation received on the surface of the earth..
Use pyrheliometer when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyrheliometer means A device that measures the intensity of solar radiation received on the surface of the earth..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pyrheliometer where its definition matches the intended context.
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