- Mesopotamia - the land between the Tigris and Euphrates; site of several ancient civilizations; part of what is now known as Iraq
--1 is a kind of geographical area, geographic area, geographical region, geographic region
--1 is a part of Iraq, Republic of Iraq, Al-Iraq, Irak
--1 has parts:Babylon; Babylonia, Chaldaea, Chaldea; Chaldea, Chaldaea; Assyria