Of or relating to the social amount of the Stone Age between your Paleolithic and Neolithic times, marked by the appearance of microlithic tools and tools and by alterations in the type of settlements.
Of or referring to the center Stone Age (also the Mesolithic period or the Mesolithic age), a prehistoric period that lasted between 10,000 and 3,000 BC.
of or regarding a middle amount of the rock Age (following paleolithic)
In prehistoric archæol., relating to the period intermediate between the Paleolithic and Neolithic periods: a term employed in the classification of postglacial deposits which contain human relics, or of such relics themselves, and referring to the relative character and degree of workmanship displayed therein. Contrasted with Eolithic, Paleolithic, and Neolithic.