Ultravacuum

Quick meaning: Ultravacuum is a noun meaning A nearly perfect vacuum; i.e. an almost or fully complete absence of matter, especially a gas at very low pressure.

Meaning

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

Example Sentences

Then there are problems of measuring what goes on in an ultravacuum. This gadget is a tensile stress-testing machine—operating on samples in an ultravacuum chamber.

These lines are so-called “‘forbidden”’ lines which, in the crowded conditions even in a laboratory vacuum, would not appear; in the ultravacuum of a nebula, the atoms have no choice but to emit the forbidden energy.

This behavior may be associated with chemical changes that are apparent in the composition of the gas phase as revealed by mass spectrometry techniques. Bursts of gas have been observed when a crystal is cleaved under ultravacuum conditions (117).

The operating principles employed in the thermal and ionization gauges are to be contrasted with the mercury manometer and Bourdon tube type vacuum gauges which have been used for years. The mechanics of these latter gauges seriously limit their use to the continuous measurement of high and ultravacuums.

Word Forms

• ultravacuums
• ultravacua

Related Words

Related dictionary entries include nonvacuum, vacuum, vacume, vacuole, void, pressurelessness.

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