(inorganic chemistry) the compound, P₂O₅, formed by the spontaneous combustion of white phosphorus in air; it reacts violently with water to form phosphoric acid and is used as a powerful desiccating agent

(chemistry) The most common allotrope of phosphorus; a yellow-white waxy solid that is insoluble in water and spontaneously combusts on exposure to air to form clouds of phosphorus pentoxide; used as a military smokescreen and as an incendiary weapon.

(chemistry) A stable allotrope of phosphorus; used in the manufacture of safety matches, pesticides etc.

In a phosphorescent manner.

The emission of light without any perceptible heat; the quality of being phosphorescent.

(inorganic chemistry) A purple crystalline allotrope of phosphorus.

(chemistry, obsolete) tetraphosphorus trisulphide

(chemistry) an inorganic polymer, of empirical formula PON, used as a flame retardant etc

(chemistry) any derivative of phosphoric acid in which each hydroxy group has been replaced with an amino or substituted amino group; P(=O)(NR₂)₃

(chemistry) the hydride of phosphorus PH₅ and any of its hydrocarbyl derivatives