carbon trioxide co3 definition, carbon trioxide co3 meaning | English dictionary

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carbon  


      n  
1   
a    a nonmetallic element existing in the three crystalline forms: graphite, diamond, and buckminsterfullerene: occurring in carbon dioxide, coal, oil, and all organic compounds. The isotope carbon-12 has been adopted as the standard for atomic wt.; carbon-14, a radioisotope with a half-life of 5700 years, is used in radiocarbon dating and as a tracer. Symbol: C; atomic no.: 6; atomic wt.: 12.011; valency: 2, 3, or 4; relative density: 1.8--2.1 (amorphous), 1.9--2.3 (graphite), 3.15--3.53 (diamond); sublimes at 3367±25°C; boiling pt.: 4827°C.  
b    (as modifier)  
a carbon compound     
2       short for       carbon paper       carbon copy  
3    a carbon electrode used in a carbon-arc light or in carbon-arc welding  
4    a rod or plate, made of carbon, used in some types of battery  
     (C18: from French carbone, from Latin carbo charcoal, dead or glowing coal)  
  carbonous      adj  


activated carbon  
      n   a porous highly adsorptive form of carbon used to remove colour or impurities from liquids and gases, in the separation and extraction of chemical compounds, and in the recovery of solvents,   (Also called)    activated charcoal, active carbon  
carbon arc  
      n  
1   
a    an electric arc produced between two carbon electrodes, formerly used as a light source  
b    (as modifier)  
carbon-arc light     
2   
a    an electric arc produced between a carbon electrode and material to be welded  
b    (as modifier)  
carbon-arc welding     
carbon bisulphide  
      n      (not in technical usage) another name for       carbon disulphide  
carbon black  
      n   a black finely divided form of amorphous carbon produced by incomplete combustion of natural gas or petroleum: used to reinforce rubber and in the manufacture of pigments and ink  
carbon brush  
      n   a small block of carbon used to convey current between the stationary and moving parts of an electric generator, motor, etc.  
carbon copy  
      n  
1    a duplicate copy of writing, typewriting, or drawing obtained by using carbon paper,   (Often shortened to)    carbon  
2    Informal   a person or thing that is identical or very similar to another  
carbon cycle  
      n  
1    the circulation of carbon between living organisms and their surroundings. Carbon dioxide from the atmosphere is synthesized by plants into plant tissue, which is ingested and metabolized by animals and reduced to carbon dioxide again during respiration and decay  
2    four thermonuclear reactions believed to be the source of energy in many stars. Carbon nuclei function as catalysts in the fusion of protons to form helium nuclei  
carbon dating  
      n      short for       radiocarbon dating  
carbon dioxide  
      n   a colourless odourless incombustible gas present in the atmosphere and formed during respiration, the decomposition and combustion of organic compounds, and in the reaction of acids with carbonates: used in carbonated drinks, fire extinguishers, and as dry ice for refrigeration. Formula: CO2,   (Also called)    carbonic-acid gas  
carbon dioxide snow  
      n   solid carbon dioxide, used as a refrigerant  
carbon disulphide  
      n   a colourless slightly soluble volatile flammable poisonous liquid commonly having a disagreeable odour due to the presence of impurities: used as an organic solvent and in the manufacture of rayon and carbon tetrachloride. Formula: CS2,   (Also called (not in technical usage))    carbon bisulphide  
carbon fibre  
      n   a black silky thread of pure carbon made by heating and stretching textile fibres and used because of its lightness and strength at high temperatures for reinforcing resins, ceramics, and metals, esp. in turbine blades and for fishing rods  
carbon fixation  
      n   the process by which plants assimilate carbon from carbon dioxide in the atmosphere to form metabolically active compounds  
carbon-14 dating  
      n      another name for       radiocarbon dating  
carbon microphone  
      n   a microphone in which a diaphragm, vibrated by sound waves, applies a varying pressure to a container packed with carbon granules, altering the resistance of the carbon. A current flowing through the carbon is thus modulated at the frequency of the sound waves  
carbon monoxide  
      n   a colourless odourless poisonous flammable gas formed when carbon compounds burn in insufficient air and produced by the action of steam on hot carbon: used as a reducing agent in metallurgy and as a fuel. Formula: CO  
carbon paper  
      n  
1    a thin sheet of paper coated on one side with a dark waxy pigment, often containing carbon, that is transferred by the pressure of writing or of typewriter keys onto the copying surface below,   (Often shortened to)    carbon  
2       another name for       carbon tissue  
carbon process   , printing  
      n   a photographic process for producing positive prints by exposing sensitized carbon tissue to light passing through a negative. Washing removes the unexposed gelatine leaving the pigmented image in the exposed insoluble gelatine  
carbon steel  
      n   steel whose characteristics are determined by the amount of carbon it contains  
carbon tetrachloride  
      n   a colourless volatile nonflammable sparingly soluble liquid made from chlorine and carbon disulphide; tetrachloromethane. It is used as a solvent, cleaning fluid, and insecticide. Formula: CCl4  
carbon tissue  
      n   a sheet of paper coated with pigmented gelatine, used in the carbon process,   (Also called)    carbon paper  
carbon value  
      n     (Chem)   an empirical measurement of the tendency of a lubricant to form carbon when in use  
flame carbon  
      n     (Electrical engineering)   a carbon electrode containing metallic salts that colour the arc in a flame-arc light  
high-carbon steel  
      n   steel containing between 0.5 and 1.5 per cent carbon  
low-carbon steel  
      n     (Engineering)   steel containing between 0.04 and 0.25 per cent carbon  
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"