#bbl__barrel  any of various units of capacity; "a barrel of beer is 31 gallons and a barrel of oil is 42 gallons"
  supertype:  #United_States_liquid_unit  #British_capacity_unit
  part of:  #hogshead.British_capacity_unit
  part:  #gallon__gal  United States liquid unit equal to 4 quarts or 3.785 liters
     part:  #quart  a United States liquid unit equal to 32 fluid ounces; four quarts equal one gallon
        part:  #pint  a United States liquid unit equal to 16 fluid ounces; two pints equal one quart
           part:  #cup.United_States_liquid_unit  a United States liquid unit equal to 8 fluid ounces
              part:  #gill  a United States liquid unit equal to 4 fluid ounces
                 part:  #fluidounce__fluid_ounce  a United States unit of capacity or volume equal to 1.804 cubic inches
                    part:  #fluidram__fluid_dram__fluiddram__fluiddrachm  a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce
                       part:  #minim  a United States liquid unit equal to 1/60 fluidram
  part:  #Imperial_gallon__gallon__congius__congiu  a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters
     part:  #quart.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 2 pints or 1.136 liters
        part:  #pint.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 4 gills or 568.26 cubic centimeters
           part:  #gill.British_capacity_unit  a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters
              part:  #fluid_ounce__fluidounce  a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters (1.734 cubic inches)
                 part:  #fluid_dram__fluiddram__fluid_drachm__fluiddrachm  a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters
                    part:  #minim.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 1/60th fluid dram or 0.059194 cubic centimeters

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