Mes·o·lith·ic 
(mĕz′ə-lĭthĭk, mĕs′-)
(mĕz′ə-lĭthĭk, mĕs′-)adj.
Of or relating to the cultural period of the Stone Age between the Paleolithic and Neolithic periods, marked by the appearance of microlithic tools and weapons and by changes in the nature of settlements.
n.
The Mesolithic Period. Also called Middle Stone Age. See Usage Note at Three Age system.
- unconsolable
- unconsolably
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- unconstitutionality
- unconstitutionally
- unconstructed
- uncontaminated
- uncontested
- uncontrollability
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- uncontrolledness
- uncontroversial
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- unconventional
- unconventionality
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- uncooked
- uncool
- uncooperative