phosphorus definition

  • noun:
    • an extremely reactive, poisonous, nonmetallic factor occurring obviously in phosphates, specially apatite, and current in three allotropic forms, white (or sometimes yellow), purple, and black. A vital constituent of protoplasm, it is utilized in safety matches, pyrotechnics, incendiary shells, and fertilizers and also to protect metal areas from deterioration. Atomic number 15; atomic fat 30.9738; melting point (white) 44.1°C; boiling point 280°C; specific-gravity (white) 1.82; valence 3, 5. See Table at element.
    • A phosphorescent compound.
    • a chemical factor (logo P) with an atomic few 15, that is out there in a number of allotropic types.
    • any material exhibiting phosphorescence; a phosphor
    • The morning star; Phosphor.
    • A poisonous nonmetallic part of the nitrogen team, obtained as a white, or yellowish, clear waxy compound, having a characteristic disagreeable scent; this waxy allotropic form can also be known as yellow phosphorus, to tell apart it from another allotropic kind, red phosphorus. It is extremely active chemically, must certanly be preserved under water, and unites with air also at ordinary conditions, providing a faint glow, -- whence its title. It constantly occurs combined, frequently in phosphates, like in the mineral apatite, in bones, etc. It is found in the structure regarding the guidelines of friction suits, as well as many other functions. The molecule includes four atoms. Symbol P. Atomic body weight 31.0.
    • Hence, any material which shines at night like phosphorus, as certain phosphorescent systems.
    • [capitalized] The morning star; Phosphor.
    • Chemical expression, P; atomic body weight, 31; specific-gravity, 1.826. An excellent non-metallic combustible compound, hitherto undecomposed, not discovered on it's own in nature, but happening chiefly in conjunction with oxygen, calcium, and magnesium.
    • a tiny container containing 12 grains of phosphorus melted in two an ounce of olive-oil. On being uncorked in the dark this solution emits light adequate to illuminate the switch of a wristwatch, and it surely will keep this home for a long time if you don't too often used.
    • [With a pl. phosphori (-rī).] During the early usage, a substance which gives off light usually than as the result of ordinary combustion.
    • a planet (usually Venus) seen before sunrise within the eastern sky
    • a multivalent nonmetallic element of the nitrogen household that develops frequently in inorganic phosphate stones and also as natural phosphates in most living cells; is very reactive and takes place in a number of allotropic types

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