From Wiktionary, the free dictionary
From ultra- + static.
ultrastatic (not comparable)
- (physics, of a spacetime) static in a precisely defined way
2015, David J. Toms, “Quantization of the minimal and non-minimal vector field in curved space”, in arXiv[1]:We adopt a Faddeev-Jackiw method of quantization and consider the case of an ultrastatic spacetime for simplicity.