#fluid.substance  a continuous amorphous substance that tends to flow and to conform to the outline of its container: a liquid or a gas
  supertype:  #substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  #gas  a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
     subtype:  #atmosphere.gas  the envelope of gases surrounding any celestial body
     subtype:  #noble_gas__noblega__inert_gas__inertga  any of the chemically inert gaseous elements of the helium group in the periodic table
        subtype:  #argon__ar__atomic_number_18  a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
        subtype:  #helium__He__atomic_number_2  a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
        subtype:  #krypton__Kr  a colorless element that is one of the six inert gasses; occurs in trace amounts in air
        subtype:  #neon__Ne__atomic_number_10  a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
        subtype:  #radon__Rn__atomic_number_86  a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
        subtype:  #xenon__Xe__atomic_number_54  a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
     subtype:  #chlorine__Cl__atomic_number_17  a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
        subtype:  #radiochlorine  a radioactive isotope of chlorine
     subtype:  #fluorine__F__atomic_number_9__atomicnumber9  a nonmetallic univalent element; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
     subtype:  #hydrogen__H__atomic_number_1__atomicnumber1  a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
        subtype:  #tritium  a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms
     subtype:  #nitrogen__N__atomic_number_7  a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
        subtype:  #azote  an obsolete name for nitrogen
        subtype:  #liquid_nitrogen  nitrogen in a liquid state
     subtype:  #oxygen__O__atomic_number_8  a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
        subtype:  #liquid_oxygen__LOX  a bluish transparent magnetic liquid obtained by compressing gaseous oxygen; used as an oxidizer in rocket propellants
     subtype:  #plasma.gas  an electrically neutral ionized gas in an electric discharge; distinctly different from solids and liquids and normal gases
        subtype:  #interplanetary_gas  a rarefied flow of gas and charged particles (plasma) that stream from the sun and form the solar wind
     subtype:  #butane  occurs in natural gas; used in the manufacture of rubber and fuels
     subtype:  #propane  colorless gas found in natural gas and petroleum; used as a fuel
     subtype:  #afterdamp  a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine
     subtype:  #firedamp  a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air
     subtype:  #arsine  a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare
     subtype:  #nitrogen_dioxide  a highly poisonous brown gas (NO2)
     subtype:  #nitric_oxide  a poisonous red-brown gas (NO)
     subtype:  #blow_gas__blowing_gas__blowingga  the gas leaving a generator during a blow period
     subtype:  #butylene__butene  any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers
        subtype:  #isobutylene  used also in making gasoline components
        subtype:  #polybutylene__polybutene  a polymer of butylene; used in lubricants and synthetic rubber
     subtype:  #cyanogen  a colorless toxic gas with a pungent almond odor; has been used in chemical warfare
     subtype:  #exhaust_fumes__exhaustfume__fumes  gases ejected from an engine as waste products
     subtype:  #air  a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
        subtype:  #breath.air  the air that is inhaled and exhaled in respiration; "his sour breath offended her"
           subtype:  #halitus  exhaled breath
              subtype:  #halitosis  offensive breath
        subtype:  #liquid_air  air in a liquid state
     subtype:  #compressed_gas  gas at a high pressure that can be used as a propellant
        subtype:  #compressed_air  air at a pressure greater than that of the atmosphere; "compressed air is often used to power machines"
           subtype:  #air_cushion  the trapped air that supports a hovercraft a short distance above the water or ground
     subtype:  #ethane  a colorless odorless gas used as fuel
     subtype:  #ethylene__ethene  a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
     subtype:  #producer_gas__air_gas__airga  a gas made of carbon monoxide and hydrogen and nitrogen; made by passing air over hot coke
     subtype:  #formaldehyde__methanal  a colorless poisonous gas; made by the oxidation of methanol
     subtype:  #liquefied_petroleum_gas__bottled_gas  hydrocarbon gases, usually propane or butane, kept under pressure
     subtype:  #water_gas  a mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal
     subtype:  #ideal_gas__idealga__perfect_gas__perfectga  a hypothetical gas with molecules of negligible size that exert no intermolecular forces
     subtype:  #inhalant.gas  something that is inhaled
     subtype:  #methane  a colorless odorless gas used as a fuel
        subtype:  #marsh_gas__marshga  methane gas produced when vegetation decomposes in water
     subtype:  #ozone  a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)
     subtype:  #phosgene  a colorless poisonous gas that smells like new-mown hay; used in chemical warfare
     subtype:  #phosphine  a colorless gas with a strong fishy smell; used as a pesticide
     subtype:  #poison_gas  (chemical warfare) a gas that is poisonous to breath or contact
        subtype:  #mustard_gas__mustardga__dichloroethyl_sulfide__dichloroethylsulfide__sulfur_mustard  a toxic war gas that raises blisters and attacks the eyes and lungs
        subtype:  #nerve_gas__nervega  a toxic war gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system
     subtype:  #propylene__propene  a flammable gas obtained by cracking petroleum; used in organic synthesis
     subtype:  #sewer_gas__sewerga  foul-smelling gas that forms in sewers
     subtype:  #sublimate  the product of vaporization of a solid
        subtype:  #mercuric_chloride__mercury_chloride__mercurychloride__bichlorideofmercury__corrosive_sublimate  a white poisonous soluble crystalline sublimate of mercury; used as a pesticide or antiseptic or wood preservative
     subtype:  #sulfur_dioxide__sulphur_dioxide__sulphurdioxide  a toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions
     subtype:  #tear_gas__lacrimator__lachrymator  a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds
        subtype:  #nitrochloromethane  gaseous form or chloropicrin used as tear gas
  subtype:  #ichor  (Greek mythology) the rarified fluid said to flow in the veins of the Gods
  subtype:  #liquid.fluid  a substance in the fluid state of matter having no fixed shape but a fixed volume
     subtype:  #artificial_blood  a liquid that can carry large amounts of oxygen and can serve as a temporary substitute for blood
     subtype:  #elixir.liquid  a sweet flavored liquid (usually containing a small amount of alcohol) used in compounding medicines to be taken by mouth in order to mask an unpleasant taste
     subtype:  #water__H2O  binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; "he asked for a drink of water"
        subtype:  #tap_water__tapwater  water directly from the spigot
        subtype:  #drinking_water  water suitable for drinking
           subtype:  #bottled_water__bottledwater  drinking water (often spring water) that is put into bottles and offered for sale
           subtype:  #branch_water  pure natural water from a stream or brook; often distinguished from soda water
           subtype:  #spring_water  water from a spring
           subtype:  #sugar_water__sugarwater  water sweetened with sugar
           subtype:  #ice_water__icewater  water served ice-cold or with ice
           subtype:  #soda_water__carbonated_water__club_soda__seltzer__sparkling_water__sparklingwater  effervescent beverage artificially charged with carbon dioxide
           subtype:  #mineral_water__mineralwater  water naturally or artificially impregnated with mineral salts or gasses; often effervescent; often used therapeutically
              subtype:  #seltzer  naturally effervescent mineral water
              subtype:  #Vichy_water  sparkling mineral water from springs at Vichy France or similar to it
              subtype:  #lithia_water  mineral water containing lithium salts
        subtype:  #bath_water  water used for a bath
        subtype:  #dishwater  water in which dishes and cooking utensils are washed
        subtype:  #distilled_water  water that has been purified by distillation
        subtype:  #holy_water  water that has been blessed by a priest for use in symbolic purification
        subtype:  #ground_water__spring_water__well_water  underground water that is held in the soil and in pervious rocks
        subtype:  #hard_water  water that contains salts that prevent the formation of lather with soap
        subtype:  #limewater  solution of calcium hydroxide in water used as an antacid
        subtype:  #seawater__saltwater__brine  water containing salts; "the water in the ocean is all saltwater"
           subtype:  #red_tide__redtide  seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin
        subtype:  #fresh_water__freshwater  water that is not salty
           subtype:  #rain__rainwater  drops of fresh water that fall as precipitation from clouds
        subtype:  #slush  partially melted snow
        subtype:  #soft_water  water that is not hard (does not contain salts that interfere with the formation of lather with soap)
        subtype:  #bilge_water__bilge  water accumulated in the bilge of a ship
        subtype:  #water_of_crystallization__water_of_hydration  the water present in hydrated compounds
     subtype:  #liquid_crystal  a liquid exhibiting properties of a crystal that are not shown by ordinary liquids
     subtype:  #Chemical_Mace__Mace  (trademark) a liquid that temporarily disables a person; prepared as an aerosol and sprayed in the face, it irritates the eyes and causes dizziness and immobilization
     subtype:  #spill.liquid  liquid that is spilled; "clean up the spills"
     subtype:  #tuberculin  a sterile liquid containing a purified protein derivative of the tuberculosis bacterium; used in the diagnosis of tuberculosis

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