noun
Paleolithic; Old Stone Age
Refers to the prehistoric period characterized by the use of stone tools.
旧石器時代の遺跡から石器が発見された。
Stone tools were discovered at a Paleolithic site.
新石器時代 refers to the Neolithic period, which followed the Paleolithic and is characterized by polished stone tools and the beginnings of agriculture.
From 旧 (old) + 石器 (stone tool) + 時代 (period).