#weight_unit  a unit used to measure weight; "he placed two weights in the scale pan"
  supertype:  #unit_of_measurement  #weight (pm)
  subtype:  #troy_unit  any of the unit of the troy system of weights
     subtype:  #grain.troy_unit  1/60 dram; equals an avoirdupois grain or 64.799 milligrams
     subtype:  #pennyweight  a unit of apothecary weight equal to 24 grains
     subtype:  #apothecaries'_ounce__apothecaries'ounce__ounce__troyounce  a unit of apothecary weight equal to 480 grains or one twelfth of a pound
     subtype:  #troy_pound__apothecaries'_pound__apothecaries'pound  an apothecary weight equal to 12 ounces or 373.242 grams
  subtype:  #apothecaries'_unit__apothecaries'unit__apothecaries'weight  any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ounces
     subtype:  #grain.troy_unit  1/60 dram; equals an avoirdupois grain or 64.799 milligrams
     subtype:  #scruple.apothecaries'_unit  a unit of apothecary weight equal to 20 grains
     subtype:  #dram.apothecaries'_unit__drachm__drachma  a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
     subtype:  #apothecaries'_ounce__apothecaries'ounce__ounce__troyounce  a unit of apothecary weight equal to 480 grains or one twelfth of a pound
     subtype:  #troy_pound__apothecaries'_pound__apothecaries'pound  an apothecary weight equal to 12 ounces or 373.242 grams
  subtype:  #arroba.weight_unit  a unit of weight used in some Spanish speaking countries
  subtype:  #catty__cattie  any of various units of weight used in SE Asia (especially a Chinese measure equal to 500 grams)
  subtype:  #crith  the weight of a liter of hydrogen (at 0 Centigrade and 760 millimeters pressure)
  subtype:  #frail.weight_unit  the weight of a frail (basket) full of raisins or figs; between 50 and 75 pounds
  subtype:  #last.weight_unit  a unit of weight equal to 4,000 pounds
  subtype:  #maund  a unit of weight used in Asia; has different values in different countries; "the official maund in India is 82.6 pounds avoirdupois"
  subtype:  #obolus  a Greek unit of weight equal to one tenth of a gram
  subtype:  #oka.weight_unit  a Turkish unit of weight equal to about 2.75 pounds
  subtype:  #picul  a unit of weight used in some parts of Asia; approximately equal to 133 pounds (the load a grown man can carry)
  subtype:  #pood  a Russian unit of weight equal to approximately 36 pounds
  subtype:  #rotl  a unit of weight used in some Moslem countries near the Mediterranean; varies between one and five pounds
  subtype:  #tael  a unit of weight used in east Asia approximately equal to 1.3 ounces
  subtype:  #welterweight.weight_unit  a weight of 28 pounds; sometimes imposed as a handicap in a horse race (such as a steeple chase or hurdle race)

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