What is "flanaess"

The Flanaess is the eastern part of the continent of Oerik, one of the four continents of the fictional world of Oerth in the World of Greyhawk campaign setting for the Dungeons & Dragons fantasy roleplaying game. The Flanaess has been the setting of dozens of adventures published between the 1970s and 2000s and continues to be the central focus of the campaign world. As well as being home to a number of demihuman and humanoid races, it is also inhabited by the Suel, Bakluni, Oerid, and Flan subraces of humanity.