Red phosphorus
Phosphorus Phos"phor*us (f[o^]s"f[o^]r*[u^]s), n.; pl. {Phosphori} (f[o^]s"f[o^]r*[imac]). [L., the morning star, Gr. fwsfo`ros, lit., light bringer; fw^s light + fe`rein to bring.] 1. The morning star; Phosphor. [1913 Webster]

2. (Chem.) A poisonous nonmetallic element of the nitrogen group, obtained as a white, or yellowish, translucent waxy substance, having a characteristic disagreeable smell; this waxy allotropic form is also called {yellow phosphorus}, to distinguish it from another allotropic form, {red phosphorus}. 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 combined, 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. [1913 Webster]

3. (Chem.) Hence, any substance which shines in the dark like phosphorus, as certain phosphorescent bodies. [1913 Webster]

{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 phosphorus}, 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.

{yellow phosphorus} (Chem.), the waxy yellow allotropic form of elemental phosphorus. See also {phosphorus}[2]. [1913 Webster +PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • red phosphorus — Phosphorus Phos phor*us (f[o^]s f[o^]r*[u^]s), n.; pl. {Phosphori} (f[o^]s f[o^]r*[imac]). [L., the morning star, Gr. fwsfo ros, lit., light bringer; fw^s light + fe rein to bring.] 1. The morning star; Phosphor. [1913 Webster] 2. (Chem.) A… …   The Collaborative International Dictionary of English

  • Red phosphorus — Red Red, a. [Compar. {Redder} ( d?r); superl. {Reddest}.] [OE. red, reed, AS. re[ a]d, re[ o]d; akin to OS. r[=o]d, OFries. r[=a]d, D. rood, G. roht, rot, OHG. r[=o]t, Dan. & Sw. r[ o]d, Icel. rau[eth]r, rj[=o][eth]r, Goth. r[ a]uds, W. rhudd,… …   The Collaborative International Dictionary of English

  • red phosphorus — raudonasis fosforas statusas T sritis chemija apibrėžtis Alotropinė fosforo atmaina. atitikmenys: angl. amorphous phosphorus; red phosphorus rus. красный фосфор …   Chemijos terminų aiškinamasis žodynas

  • red phosphorus — noun : the element phosphorus in its red allotropic form …   Useful english dictionary

  • red phosphorus — noun a stable allotrope of phosphorus; used in the manufacture of safety matches, pesticides etc …   Wiktionary

  • Phosphorus — Phos phor*us (f[o^]s f[o^]r*[u^]s), n.; pl. {Phosphori} (f[o^]s f[o^]r*[imac]). [L., the morning star, Gr. fwsfo ros, lit., light bringer; fw^s light + fe rein to bring.] 1. The morning star; Phosphor. [1913 Webster] 2. (Chem.) A poisonous… …   The Collaborative International Dictionary of English

  • Phosphorus disease — Phosphorus Phos phor*us (f[o^]s f[o^]r*[u^]s), n.; pl. {Phosphori} (f[o^]s f[o^]r*[imac]). [L., the morning star, Gr. fwsfo ros, lit., light bringer; fw^s light + fe rein to bring.] 1. The morning star; Phosphor. [1913 Webster] 2. (Chem.) A… …   The Collaborative International Dictionary of English

  • Phosphorus trioxide — Phosphorus trioxide …   Wikipedia

  • Phosphorus trichloride — Phosphorus trichloride …   Wikipedia

  • Phosphorus tribromide — Phosphorus tribromide …   Wikipedia

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