ultracold

Adjective

Meaning

(physics) Of a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.

(informal) Extremely cold; of utmost coldness.

Examples

Maintaining the cold chain for coronavirus vaccines won’t be easy in the richest of countries, especially when it comes to the handful of candidates that require ultracold temperatures of around minus 70 degrees Celsius. Source: Internet

These vaccines have to be frozen—in Pfizer/BioNTech’s case, at an ultracold –94 degrees Fahrenheit, colder than most freezers—which will limit how and where they can be shipped. Source: Internet

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