messinian

from The Century Dictionary.

• Of or pertaining to Messina; in geology, noting a division of the Tertiary in Italy commonly regarded as appertaining to the base of the Pliocene, though by some authors considered as the top of the Miocene. It is constituted of deposits indicating alternations of marine and brackish-water conditions.
• noun An inhabitant of Messina.
• noun In geology, the Messinian formation.