Mesopotamia is a Greek word meaning “between the rivers” or the “land between two rivers.”

The two rivers are the Tigris and Euphrates. The two rivers actually begin in eastern Turkey and flow southeast. They converge in southeast present-day Iraq and empty into the Persian Gulf. The Euphrates also flows through much of Syria.

Sources:

The British Museum: Ancient Mesopotamia

Hammurabi's Code of Laws (translated by L/W. King)

Mesopotamia Math: Cuneiform Calculator

Mr. Donn: Ancient Mesopotamia

National Geographic

Phillip Martin: Hammurabi's Code

University of Chicago Mesopotamia Map

University Pennsylvania:About Cuneiform Writing...

Washington State University: Gilgamesh

West Semitic Research Project, Cuneiform, USC