Solved cryptogram

White phosphorus glows in the dark all by itself, and the name means bearer of light.

Chemistry Facts, sourced to Royal Society of Chemistry.

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What it means

The glow is a slow reaction with oxygen in the air rather than stored light being released, so it is chemiluminescence rather than phosphorescence, despite the element having lent its name to the second word. It was isolated in 1669 by a German alchemist boiling down urine in search of gold, which makes it the first element with a documented discoverer.

The claim comes from Royal Society of Chemistry.

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