Phosphor waa magac tilmaamaya walaxda ifaysa marka ay la kulmaan shucaaca ama noocyada kale ee tamarta, sida iftiinka ultraviolet ama koronto. Fosfooraska waxaa inta badan loo adeegsadaa nalalka dhaadheer, shashadaha telefishinka, iyo aaladaha kale ee soo saara iftiinka. Eraygu waxa kale oo uu tilmaami karaa nooc ka mid ah curiyaha kiimikaad, sida fosfooraska, kaas oo leh sifooyin la mid ah.