in vacuo
- idiom
- /ɪn ˈvæk.ju.oʊ/
- Specialized
- Some crystals form only when they are grown in vacuo.
Examples
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The substance was heated in vacuo to prevent unwanted reactions with air.
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The experiment must be conducted in vacuo for accurate results.
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The experiment was conducted in vacuo to ensure accuracy.
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The scientist explained the concept of pressure in vacuo during the lecture.
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The experiment must be conducted in vacuo for accurate results.
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Some crystals form only when they are grown in vacuo.
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The substance was heated in vacuo to prevent unwanted reactions with air.
Synonyms
Happens in isolation without outside influence
Surface Forms
Morphology
The phrase literally combines the preposition 'in' with 'vacuo' (meaning 'in isolation' or 'in emptiness'), so its meaning 'in a vacuum / in isolation' is directly derivable from the constituents. Although 'vacuo' is a Latin-derived technical term, its root matches English cognates (vacuum, vacant) and the composition follows a regular spatial/abstract pattern, making the expression transparent to a learner who knows both parts.
Etymology
In vacuo comes from Latin words in and vacuo, meaning 'in empty space'. Picture an object inside a glass jar where the air has been sucked out so nothing can touch it. That's why scientists use the phrase to mean 'in a vacuum' with no air or gas.