copper (Cu); bronze (medal)
shakudo; gold-copper alloy, often with a blue patina
weight (for scales); counterweight
bell-shaped bronze vessel of Yayoi period
bronze or copper (color, colour)
copperplate engraving; etching
copper plate; copperplate
bronze (third-place) prize
gold, silver and bronze (medals)
Wadō era (708.1.11-715.9.2)
bronze medal; copper medal
bronze hoko; bronze halberd; bronze spearhead
copper oxide (i.e. cuprous oxide, cupric oxide)
copper pyrites; fool's gold; chalcopyrite
bronze wedding (anniversary)
cupronickel (alloy of approximately 80% copper and 20% nickel)
copper foil (used in copper plating); copper layer (of printed circuits)
Copper Age (period in which metal tools started to be used alongside stone tools)
cuprous ammoniacal process
cuprite; red copper; red copper ore
vitreous copper; copper glance; chalcocite
cupriferous; containing copper
cupreous chafer (scarabaeid beetle, Anomala cuprea)