solar phosphori

GNU Webster's 1913

1. n. (Chem.) phosphorescent substances which shine in the dark after exposure to the sunlight or other intense light.
2. adj. (Physics) certain substances, as the diamond, siulphide of barium (Bolognese or Bologna phosphorus), calcium sulphide, etc., which become phosphorescent, and shine in the dark, after exposure to sunlight or other intense light.