mass noun
an alloy of copper and zinc resembling gold, used in watchmaking and cheap jewellery
金色铜; 铜锌合金（用于制造钟表和廉价珠宝饰物）。
appearing valuable, but actually cheap or tawdry
仿制的, 假冒的; 廉价的。
词源
mid 18th cent.: named after Christopher Pinchbeck (died 1732), English watchmaker.