Dictionary > English Dictionary > Definition, synonym and antonym of Phosphorus
Meaning of phosphorus by Wiktionary Dictionary

Phosphorus


    Alternative forms

    • Phosphor

    Etymology

    From Latinised Greek Phosphorus, from Ancient Greek Φωσφόρος ( Fōsforos, “the bearer of light” ) < φῶς ( fōs, “light” ) + φέρω ( pherō, “I bear, carry” ) .

    Pronunciation

    • ( RP ) fŏs'fərəs, /ˈfɒsfərəs/, SAMPA: /"fQsf@r@s/
    • ( US ) fäs'fərəs, /ˈfɑsfɚəs/, SAMPA: /"fAsf@`@s/
    • Homophone: phosphorous, phosphorus

    Proper noun

    Phosphorus

    1. A name sometimes used for Hesperus, the personification in Greek mythology of the planet Venus .
    2. An ancient Greek name for the morning star ( the planet Venus when it is visible in the eastern sky before sunrise ) .

    Synonyms

    Antonyms

    Derived terms

    • Phosphorian

    See also

    • Lucifer
    • Hesperus on Wikipedia .


Explanation of phosphorus by Wordnet Dictionary

Phosphorus


    Noun
    1. a planet ( usually Venus ) seen just before sunrise in the eastern sky

    2. a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells



    Definition of phosphorus by GCIDE Dictionary

    Phosphorus


    1. Phosphorus ( fŏsfŏrŭs ), n.; pl. Phosphori ( fŏsfŏrī ). [L., the morning star, Gr. φωσφόρος, lit., light bringer; φῶς light + φέρειν to bring.]
      1. The morning star; Phosphor.

      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. It is an essential component of the genetic material of all living organisms. The molecule contains four atoms. Symbol P. Atomic weight 31.0.

      3. ( Chem. ) 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 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 phosphorus2.