3. (Chem.)
Defn: Hence, any substance which shines in the dark like phosphorus, as certain phosphorescent bodies. Bologna phosphorus (Chem.), sulphide of barium, which shines in the dark after exposure to light; — so called because this property was discovered by a resident of Bologna. The term is sometimes applied to other compounds having similar properties. — Metallic phosphorus (Chem.), an allotropic modification of phosphorus, obtained as a gray metallic crystalline substance, having very inert chemical properties. It is obtained by heating ordinary phosphorus in a closed vessel at a high temperature. — Phosphorus disease (Med.), a disease common among workers in phosphorus, giving rise to necrosis of the jawbone, and other symptoms. — Red, or Amorphous, phosphorus (Chem.), an allotropic modification of phosphorus, obtained as a dark red powder by heating ordinary phosphorus in closed vessels. It is not poisonous, is not phosphorescent, and is only moderately active chemically. It is valuable as a chemical reagent, and is used in the composition of the friction surface on which safety matches are ignited. — Solar phosphori (Chem.), phosphorescent substances which shine in the dark after exposure to the sunlight or other intense light.
PHOSPHORUS STEEL
Phosphorus steel.
Defn: A steel in which the amount of phosphorus exceeds that of carbon.
PHOSPHORYL
Phos"phor*yl, n. Etym: [Phosphorus + -yl.] (Chem.)
Defn: The radical PO, regarded as the typical nucleus of certain compounds.
PHOSPHURET
Phos"phu*ret, n. (Chem.)
Defn: A phosphide. [Obsoles.]
PHOSPHURETED
Phos"phu*ret`ed, a. (Chem.)
Defn: Impregnated, or combined, with phosphorus. [Obsoles.] [Written also phosphuretted.] Phosphureted hydrogen. (Chem.) See Phosphine.