PHOSPHOROGENIC
Phos`phor*o*gen"ic, a. Etym: [Phosphorus + -gen + -ic.]
Defn: Generating phosphorescence; as, phosphorogenic rays.
PHOSPHOROSCOPE
Phos*phor"o*scope, n. Etym: [Phosphorus + -scope.] (Physics)
Defn: An apparatus for observing the phosphorescence produced in different bodies by the action of light, and for measuring its duration.
PHOSPHOROUS
Phos"phor*ous, a. Etym: [Cf. F. phosphoreux.] (Chem.)
Defn: Of or pertaining to phosphorus; resembling or containing phosphorus; specifically, designating those compounds in which phosphorus has a lower valence as contrasted with phosphoric compounds; as, phosphorous acid, H3PO3.
PHOSPHORUS
Phos"phor*us, n.; pl. Phosphori. Etym: [L., the morning star, Gr.
1. The morning star; Phosphor.
2. (Chem.)
Defn: A poisonous nonmetallic element of the nitrogen group, obtained as a white, or yellowish, translucent waxy substance, having a characteristic disagreeable smell. It is very active chemically, must be preserved under water, and unites with oxygen even at ordinary temperatures, giving a faint glow, — whence its name. It always occurs compined, usually in phosphates, as in the mineral apatite, in bones, etc. It is used in the composition on the tips of friction matches, and for many other purposes. The molecule contains four atoms. Symbol P. Atomic weight 31.0.