#coin  a metal piece (usually a disc) used as money
  supertype:  #specie__coinage__mintage__metal_money__metalmoney  coins collectively
  subtype:  #change.coin  #bawbee  #bezant  #ducat  #real  #piece_of_eight  #shilling  #crown.coin  #half_crown  #dime  #nickel  #quarter.coin  #half_dollar  #halfpenny  #penny.coin  #tenpence  #twopence  #threepence  #fourpence  #fivepence  #sixpence  #eightpence  #ninepence  #dollar.coin  #eagle.coin  #half_eagle  #guinea  #farthing  #doubloon  #louis_d'or  #medallion.coin  #stater.coin  #sou
  part:  #head.obverse  (usually plural) an obverse side of a coin that bears the representation of a person's head; "call heads or tails!"
  part:  #obverse.side  the side of a coin or medal bearing the principal stamp or design
  part:  #reverse.side__verso  the side of a coin or medal that does not bear the principal design
  part:  #tail.reverse  (usually plural) the reverse side of a coin that does not bear the representation of a person's head

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