from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The outer surface of the ergosphere
Sorry, no etymologies found.
This boundary is sometimes called the “ergosurface”, but it is just a boundary and has no more solidity than the event horizon.
At points exactly on the ergosurface, spacetime is “dragged around at the speed of light.” on the inside, the (outer) event horizon.