of or relating to a period characterized by the use of both stone and bronze implements
Chalcolithic in American English
(ˌkælkəˈlɪθɪk)
adjective
of, pertaining to, or characteristic of the Copper Age; Aeneolithic
Word origin
[1900–05; chalco- + -lithic]This word is first recorded in the period 1900–05. Other words that entered Englishat around the same time include: cathode-ray tube, desensitize, geopolitics, hormone, internship