There wasn't a single, universally accepted name for Earth when it was a single landmass. However, the term Pangaea is used to refer to the supercontinent that existed about 335 to 175 million years ago.

It's important to remember that the concept of Pangaea was a scientific discovery, not a name used by ancient civilizations. The term "Pangaea" was coined in 1912 by Alfred Wegener, a German meteorologist and geophysicist, who proposed the theory of continental drift.