Phosphorus was an element on the periodic table.

The crew of the Henrietta used phosphorus to make themselves and their ship glow, making them look like the crew of the Flying Dutchman. (AUDIO: The Flying Dutchman)

Phosphorus was a component of the Thijarian remnant. (TV: Demons of the Punjab)

White phosphorus was used on matches in the late 19th century and could ignite from friction. (PROSE: The Death of Art) White phosphorus was also used in grenades and was colloquially known as "Willie Peter". (PROSE: Drift)

Phosphorus gave off a dull green glow. (PROSE: Divided Loyalties, The Scales of Injustice)