Gas definition, Gas meaning | English dictionary

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gas

  

      n   pl   , gases, gasses  
1    a substance in a physical state in which it does not resist change of shape and will expand indefinitely to fill any container. If very high pressure is applied a gas may become liquid or solid, otherwise its density tends towards that of the condensed phase  
   Compare       liquid       1       solid       1  
2    any substance that is gaseous at room temperature and atmospheric pressure  
3    any gaseous substance that is above its critical temperature and therefore not liquefiable by pressure alone  
   Compare       vapour       2  
4   
a    a fossil fuel in the form of a gas, used as a source of domestic and industrial heat  
   See also       coal gas       natural gas  
b    (as modifier)  
a gas cooker, gas fire     
5    a gaseous anaesthetic, such as nitrous oxide  
6      (Mining)   firedamp or the explosive mixture of firedamp and air  
7    the usual U.S., Canadian, and New Zealand word for petrol, a shortened form of gasoline  
8    step on the gas  
Informal  
a    to increase the speed of a motor vehicle; accelerate  
b    to hurry  
9    a toxic or suffocating substance in suspension in air used against an enemy  
10    Informal   idle talk or boasting  
11    Slang   a delightful or successful person or thing  
his latest record is a gas     
12      (U.S.)      an informal name for       flatus  
      vb   , gases, gasses, gassing, gassed  
13    tr   to provide or fill with gas  
14    tr   to subject to gas fumes, esp. so as to asphyxiate or render unconscious  
15    intr   to give off gas, as in the charging of a battery  
16    tr   (in textiles) to singe (fabric) with a flame from a gas burner to remove unwanted fibres  
17    intr; foll by: to  
Informal   to talk in an idle or boastful way (to a person)  
18    tr  
Slang     (chiefly U.S. and Canadian)   to thrill or delight  
     (C17 (coined by J. B. van Helmont (1577--1644), Flemish chemist): modification of Greek khaos atmosphere)  
  gasless      adj  


advanced gas-cooled reactor  
      n   a nuclear reactor using carbon dioxide as the coolant, graphite as the moderator, and ceramic uranium dioxide cased in stainless steel as the fuel,   (Abbrev.)    AGR  
air gas  
      n      another name for       producer gas  
Calor Gas  
      n   Trademark   butane gas liquefied under pressure in portable containers for domestic use  
carbonic-acid gas  
      n      another name for       carbon dioxide  
coal gas  
      n   a mixture of gases produced by the distillation of bituminous coal and used for heating and lighting: consists mainly of hydrogen, methane, and carbon monoxide  
CS gas  
      n   a gas causing tears, salivation, and painful breathing, used in civil disturbances; ortho-chlorobenzal malononitrile. Formula: C6H4ClCH:C(CN)2  
     (C20: from the surname initials of its US inventors, Ben Carson and Roger Staughton)  
electrolytic gas  
      n   a mixture of two parts of hydrogen and one part of oxygen by volume, formed by the electrolysis of water  
flue gas  
      n   the smoke in the uptake of a boiler fire: it consists mainly of carbon dioxide, carbon monoxide, and nitrogen  
gas black  
      n   finely powdered carbon produced by burning natural gas. It is used as a pigment in paints, etc.  
gas burner  
      n  
1      (Also called)    gas jet   a jet or nozzle from which a combustible gas issues in order to form a stable flame  
2    an assembly of such jets or nozzles, used esp. in cooking  
gas chamber   , oven  
      n   an airtight room into which poison gas is introduced to kill people or animals  
gas chromatography  
      n   a technique for analysing a mixture of volatile substances in which the mixture is carried by an inert gas through a column packed with a selective adsorbent and a detector records on a moving strip the conductivity of the gas leaving the tube. Peaks on the resulting graph indicate the presence of a particular component,   (Also called)    gas-liquid chromatography  
gas coal  
      n   coal that is rich in volatile hydrocarbons, making it a suitable source of domestic gas  
gas constant  
      n   the constant in the gas equation. It is equal to 8.3143 joules per kelvin per mole.,   (Symbol)    R     (Also called)    universal gas constant  
gas-cooled reactor  
      n   a nuclear reactor using a gas as the coolant. In the Mark I type the coolant is carbon dioxide, the moderator is graphite, and the fuel is uranium cased in magnox  
   See also       advanced gas-cooled reactor  
gas-discharge tube  
      n     (Electronics)   any tube in which an electric discharge takes place through a gas  
gas engine  
      n   a type of internal-combustion engine using a flammable gas, such as coal gas or natural gas, as fuel  
gas equation  
      n   an equation that equates the product of the pressure and the volume of one mole of a gas to the product of its thermodynamic temperature and the gas constant. The equation is exact for an ideal gas and is a good approximation for real gases at low pressures,   (Also called)    ideal gas equation, law  
gas gangrene  
      n   gangrene resulting from infection of a wound by anaerobic bacteria (esp. Clostridium welchii) that cause gas bubbles and swelling in the surrounding tissues  
gas laws  
      pl n   the physical laws obeyed by gases, esp. Boyle's law and Charles' law  
   See also       gas equation  
gas lighter  
      n  
1    a device for igniting a jet of gas  
2    a cigarette lighter using a gas as fuel  
gas-liquid chromatography  
      n      another name for       gas chromatography  
gas main  
      n   a large pipeline in which gas is carried for distribution through smaller pipes to consumers  
gas mantle  
      n   a mantle for use in a gaslight  
   See       mantle       4  
gas mask  
      n   a mask fitted with a chemical filter to enable the wearer to breathe air free of poisonous or corrosive gases: used for military or industrial purposes,   (Also called (in Britain))    respirator  
gas meter  
      n   an apparatus for measuring and recording the amount of gas passed through it  
gas oil  
      n   a fuel oil obtained in the distillation of petroleum, intermediate in viscosity and boiling point between paraffin and lubricating oils. It boils above about 250°C  
gas oven  
      n  
1    a domestic oven heated by gas  
2    a gas-fuelled cremation chamber  
3       another name for       gas chamber  
gas-permeable lens  
      n   a contact lens made of rigid plastic that is more permeable to air than a standard hard lens,   (Abbrev.)    GP      Compare       hard lens       soft lens  
gas plant  
      n   an aromatic white-flowered Eurasian rutaceous plant, Dictamnus albus, that emits a vapour capable of being ignited,   (Also called)    burning bush, dittany, fraxinella  
gas poker  
      n   a long tubular gas burner used to kindle a fire  
gas ring  
      n   a circular assembly of gas jets, used esp. for cooking  
gas station  
      n     (Chiefly U.S. and Canadian)      another term for       filling station  
gas thermometer  
      n   a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas kept at a constant pressure  
gas turbine  
      n   an internal-combustion engine in which the expanding gases emerging from one or more combustion chambers drive a turbine. A rotary compressor driven by the turbine compresses the air used for combustion, power being taken either as torque from the turbine or thrust from the expanding gases  
gas vacuole  
      n     (Biology)   a gas-filled structure that provides buoyancy in some aquatic bacteria  
gas welding  
      n   a method of welding in which a combination of gases, usually oxyacetylene, is used to provide a hot flame  
gas well  
      n   a well for obtaining natural gas  
ideal gas  
      n   a hypothetical gas which obeys Boyle's law exactly at all temperatures and pressures, and which has internal energy that depends only upon the temperature. Measurements upon real gases are extrapolated to zero pressure to obtain results in agreement with theories relating to an ideal gas, especially in thermometry,   (Also called)    perfect gas  
inert gas  
      n  
1      (Also called)    noble gas, rare gas, argonon   any of the unreactive gaseous elements helium, neon, argon, krypton, xenon, and radon  
2    (loosely) any gas, such as carbon dioxide, that is nonoxidizing  
laughing gas  
      n      another name for       nitrous oxide  
liquefied natural gas  
      n   a mixture of various gases, esp. methane, liquefied under pressure for transportation and used as an engine fuel,   (Abbrev.)    LNG  
liquefied petroleum gas  
      n   a mixture of various petroleum gases, esp. propane and butane, stored as a liquid under pressure and used as an engine fuel  
   See also       bottled gas     (Abbrev.)    LPG, LP gas  
marsh gas  
      n   a hydrocarbon gas largely composed of methane formed when organic material decays in the absence of air  
mustard gas  
      n   an oily liquid vesicant compound used in chemical warfare. Its vapour causes blindness and burns. Formula: (ClCH2CH2)2S  
natural gas  
      n   a gaseous mixture consisting mainly of methane trapped below ground; used extensively as a fuel  
nerve gas  
      n   (esp. in chemical warfare) any of various poisonous gases that have a paralysing effect on the central nervous system that can be fatal  
noble gas  
      n      another name for       inert gas       1  
North-Sea gas  
      n   (in Britain) natural gas obtained from deposits below the North Sea  
perfect gas  
      n      another name for       ideal gas  
poison gas  
      n   a gaseous substance, such as chlorine, phosgene, or lewisite, used in warfare to kill or harm  
producer gas  
      n   a mixture of carbon monoxide and nitrogen produced by passing air over hot coke, used mainly as a fuel,   (Also called)    air gas      See also       water gas  
rare gas  
      n      another name for       inert gas       1  
sewage gas  
      n   gas given off in the digestion of sewage consisting of approximately 66 per cent methane and 34 per cent carbon dioxide  
synthesis gas  
      n     (Chem)  
1    a mixture of carbon dioxide, carbon monoxide, and hydrogen formerly made by using water gas and reacting it with steam to enrich the proportion of hydrogen for use in the synthesis of ammonia  
2    a similar mixture of gases made by steam reforming natural gas, used for synthesizing organic chemicals and as a fuel  
tear gas  
      n   any one of a number of gases or vapours that make the eyes smart and water, causing temporary blindness; usually dispersed from grenades and used in warfare and to control riots,   (Also called)    lacrimator  
town gas  
      n   coal gas manufactured for domestic and industrial use  
universal gas constant  
      n      another name for       gas constant  
water gas  
      n   a mixture of hydrogen and carbon monoxide produced by passing steam over hot carbon, used as a fuel and raw material  
   See also       producer gas  
English Collins Dictionary - English Definition & Thesaurus  
Collaborative Dictionary     English Definition
n.
poisonous gas that pollutes the air in coal mines
n.
work and operations made in drilling for maintaining petroleum or Gas wells effective
q.
This expression means it is better to let one's emotions out, rather than bottled up inside. It is also often said when someone has gas.
this is just something my grandmother would say in cajun french
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