platygaeanism means the belief that the Earth's shape is a plane or disk. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From platy- + Gaea + -an + -ism.
noun
- The belief that the Earth's shape is a plane or disk.“It should be clear that my presentation of platygaeanism is *much* more cogent and intelligent than anything creationists or astrologers have been able to come up with.”