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• atmosphere go
  the envelope of gases surrounding any celestial body
  
• noble gas, inert gas, argonon go
  any of the chemically inert gaseous elements of the helium group in the periodic table
  
• chlorine, Cl, atomic number 17 go
  a common nonmetallic element belonging to the halogens
  
• F, fluorine, atomic number 9 go
  a nonmetallic univalent element belonging to the halogens
  
• H, hydrogen, atomic number 1 go
  a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas
  
• N, nitrogen, atomic number 7 go
  a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas
  
• O, oxygen, atomic number 8 go
  a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas
  
• butane go
  occurs in natural gas
  
• propane go
  colorless gas found in natural gas and petroleum
  
• afterdamp go
  a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine
  
• firedamp go
  a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air
  
• arsine go
  a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare
  
• nitrogen dioxide go
  a highly poisonous brown gas (NO2)
  
• nitric oxide go
  a poisonous red-brown gas (NO)
  
• blow gas, blowing gas go
  the gas leaving a generator during a blow period
  
• butylene, butene go
  any of three isomeric hydrocarbons C4H8
  
• cyanogen go
  a colorless toxic gas with a pungent almond odor
  
• exhaust, exhaust fumes, fumes go
  gases ejected from an engine as waste products
  
• air go
  a mixture of gases (especially oxygen) required for breathing
  
• compressed gas go
  gas at a high pressure that can be used as a propellant
  
• ethylene, ethene go
  a flammable colorless gaseous alkene
  
• producer gas, air gas go
  a gas made of carbon monoxide and hydrogen and nitrogen
  
• formaldehyde, methanal go
  a colorless poisonous gas
  
• greenhouse gas, greenhouse emission go
  a gas that contributes to the greenhouse effect by absorbing infrared radiation
  
• liquefied petroleum gas, bottled gas go
  hydrocarbon gases, usually propane or butane, kept under pressure
  
• water gas go
  a mixture of hydrogen and carbon monoxide with small amounts of other gases
  
• ideal gas, perfect gas go
  a hypothetical gas with molecules of negligible size that exert no intermolecular forces
  
• inhalant go
  something that is inhaled
  
• methane go
  a colorless odorless gas used as a fuel
  
• ozone go
  a colorless gas (O3) soluble in alkalis and cold water
  
• phosgene go
  a colorless poisonous gas that smells like new-mown hay
  
• phosphine go
  a colorless gas with a strong fishy smell
  
• poison gas go
  a gas that is poisonous to breath or contact
  
• propylene, propene go
  a flammable gas obtained by cracking petroleum
  
• mephitis go
  a poisonous or foul smelling gas emitted from the earth
  
• sewer gas go
  foul-smelling gas that forms in sewers
  
• sublimate go
  the product of vaporization of a solid
  
• sulfur dioxide, sulphur dioxide go
  a colorless toxic gas (SO2) that occurs in the gases from volcanoes
  
• tear gas, teargas, lacrimator, lachrymator go
  a gas that makes the eyes fill with tears but does not damage them