cyanometer

[sahy-uh-nom-i-ter]

noun

Optics.

1. an instrument for measuring the amount and intensity of blue in light, as of the sky.

Word History and Origins

Origin of cyanometer¹

First recorded in 1820–30; cyano- ¹ + -meter

Example Sentences

He would study geology in the field, and took Saussure in his trunk he would note meteorology: he made a cyanometer—a scale of blue to measure the depth of tone, the colour whether of Rhine-water or of Alpine skies.

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Thermometer 21; hygrometer 39.3; cyanometer 16 degrees.

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This intensity, measured with the cyanometer of Saussure, was found from November to January generally 18, never above 20 degrees.

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It corresponded only to 12 degrees of the cyanometer.

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Its intensity at the zenith appeared to correspond to 41 degrees of the cyanometer.

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