noun
Metal Age
Archaeological term covering both the Bronze Age and the Iron Age. Used in historical and academic contexts.
金属器時代は青銅器時代と鉄器時代に分けられる。
The Metal Age is divided into the Bronze Age and the Iron Age.
Compound of 金属 (metal) + 器 (utensil, tool) + 時代 (age, era). A straightforward modern academic term.