#medium.substance  an intervening substance through which something is achieved; "the dissolving medium is called a solvent"
  supertype:  #substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  #dissolvent__solvent__dissolver__dissolving_agent__resolvent  a liquid substance capable of dissolving other substances; "the solvent does not change its state in forming a solution"
     subtype:  #acetone__propanone__dimethyl_ketone  the simplest ketone; a highly inflammable liquid widely used as an organic solvent and as material for making plastics
     subtype:  #carbolic_acid__carbolicacid__phenol__hydroxybenzene__oxybenzene__phenylic_acid  a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally
     subtype:  #carbon_tetrachloride__carbon_tet__tetrachloromethane__perchloromethane  a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined
     subtype:  #medium.dissolvent  a liquid with which pigment is mixed by a painter
        subtype:  #megilp__megalp  a medium for oil-paints; linseed oil mixed with mastic varnish or turpentine
     subtype:  #hexane  a colorless flammable liquid alkane derived from petroleum and used as a solvent
     subtype:  #naphtha  any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
     subtype:  #remover.dissolvent  a solvent that removes a substance (usually from a surface); "paint remover" or "rust remover" but also "hair remover"
     subtype:  #alkahest__alcahest__universal_solvent  hypothetical universal solvent once sought by alchemists
     subtype:  #toluene  a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels
     subtype:  #xylene__xylol  a colorless flammable volatile liquid hydrocarbon used as a solvent

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