Original: The Mesolithic (Greek: mesos "middle", lithos stone) or "Middle Stone Age"This translation can be ambiguous since Middle Stone Age is an older African prehistoric period.
Simplified: The "Mesolithic," or "Middle Stone Age" (from the Greek "mesos," "middle," and "lithos," "stone") was a period in the development of human technology between the Paleolithic and Neolithic periods of the Stone Age.