ultravacuum

English

Etymology

ultra- +‎ vacuum

Noun

ultravacuum (plural ultravacuums or ultravacua)

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.

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