The earliest known period of human culture, marked by the use of stone tools.
Unknown means something that people are not aware of or familiar with.
A grammatical intensifier, often used in describing something positive. (Mostly in idioms like good old, big old and little old, any old and some old.)
Find another word for prehistoric. In this page you can discover 23 synonyms, antonyms, idiomatic expressions, and related words for prehistoric, like: ancient, prehistorical, stone-age, neolithic, , prehistory, bronze-age, palaeolithic, , rock art and medieval.