relating to or denoting a period in the 4th and 3rd millennia BC, chiefly in the Near East and south-eastern Europe, during which some weapons and tools were made of copper. This period was still largely Neolithic in character

the houses were built in the Chalcolithic period

a period in the 4th and 3rd millennia BC, chiefly in the Near East and south-eastern Europe, during which some weapons and tools were made of copper

the site dates from the Chalcolithic