Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
period of time | Yes | No | No | No |
Upper Paleolithic | Yes | No | No | No |
period of time (noun) | Upper Paleolithic (noun) |
---|---|
an amount of time | the time period during which only modern Homo sapiens was known to have existed; ended about 10,000 years BC |