Palus Epidemiarum (Moon)

"Marsh of Epidemics"

Palus Epidemiarum is a small lunar mare in the southwestern part 's near side. It lies to the southwest of Mare Nubium, and southeast of Mare Humorum. This feature forms a rough band of lava-flooded terrain that runs generally west–east, with a northward extension near the western end. This mare is notable for a system of rilles in the western end named the Rimae Ramsden, and for the wide Rima Hesiodus that extends from near the midpoint to the east-northeast roughly 300 km. (wikipedia entry)

A palus is a "Swamp"; small plain. On the Moon they are named after latin terms describing weather and other abstract concepts.