yellow phosphorus

yellow 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.

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  • yellow 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

  • yellow phosphorus — baltasis fosforas statusas T sritis chemija apibrėžtis Alotropinė P atmaina, sudaryta iš P₄ molekulių. atitikmenys: angl. yellow phosphorus; white phosphorus rus. белый фосфор …   Chemijos terminų aiškinamasis žodynas

  • yellow phosphorus — noun alternative name of white phosphorus …   Wiktionary

  • yellow phosphorus — noun : white phosphorus …   Useful english dictionary

  • Yellow phosphorus — Желтый фосфор …   Краткий толковый словарь по полиграфии

  • 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 — This article is about the chemical element. For other uses, see Phosphorus (disambiguation). silicon ← phosphorus → sulfur …   Wikipedia

  • phosphorus paste — noun a) a paste of yellow phosphorus and water, mixed with flour and used as an insecticide and rat poison b) a paste of white phosphorus used to tip early matches …   Wiktionary

  • phosphorus necrosis — necrosis of the jaw, sometimes associated with deposition of new subperiosteal bone, occurring in workers exposed to yellow phosphorus fumes. Called also phosphonecrosis and phossy jaw …   Medical dictionary

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