#British_capacity_unit__Imperial_capacity_unit  a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet
  supertype:  #liquid_unit  #dry_unit
  subtype:  #bbl__barrel  any of various units of capacity; "a barrel of beer is 31 gallons and a barrel of oil is 42 gallons"
  subtype:  #minim.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 1/60th fluid dram or 0.059194 cubic centimeters
  subtype:  #fluid_dram__fluiddram__fluid_drachm__fluiddrachm  a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters
  subtype:  #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)
  subtype:  #gill.British_capacity_unit  a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters
  subtype:  #pint.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 4 gills or 568.26 cubic centimeters
  subtype:  #quart.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 2 pints or 1.136 liters
  subtype:  #Imperial_gallon__gallon__congius__congiu  a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters
  subtype:  #peck.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 2 gallons
  subtype:  #bushel.British_capacity_unit  a British imperial capacity measure (liquid or dry) equal to 4 pecks
  subtype:  #firkin.British_capacity_unit  a British unit of capacity equal to 9 imperial gallons
  subtype:  #kilderkin  an obsolete British unit of capacity equal to 18 Imperial gallons
  subtype:  #quarter.British_capacity_unit  (British) a quarter of a hundredweight (28 pounds)
  subtype:  #hogshead.British_capacity_unit  a British unit of capacity for alcoholic beverages
  subtype:  #chaldron  a British imperial capacity measure (liquid or dry) equal to 36 bushels

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