ultravacuum

English

Etymology

ultra- +‎ vacuum

Noun

ultravacuum (plural ultravacuums or ultravacua)

1. A near-perfect vacuum; i.e. an almost or fully complete absence of matter, especially a gas at very low pressure.

References

• “ultravacuum”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “ultravacuum” in TheFreeDictionary.com, Huntingdon Valley, Pa.: Farlex, Inc., 2003–2024.