It appears in many words related to light, such as:
* Phosphorous: A chemical element that glows in the dark.
* Photogenic: Easily photographed, attractive in photographs.
* Phosphate: A salt or ester of phosphoric acid.
* Photosynthesis: The process by which plants convert light energy into chemical energy.
* Phosphorescence: The emission of light by a substance after it has been exposed to light.