#worth.indefinite_quantity  an indefinite quantity of something having a specified value; "10 dollars worth of gasoline"
  supertype:  #indefinite_quantity  an estimated quantity
  subtype:  #halfpennyworth__ha'p'orth  the amount that can be bought for a halfpenny
  subtype:  #pennyworth__penn'orth  the amount that can be bought for a penny

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