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absolute zero
noun
: a theoretical temperature characterized by complete absence of heat and motion and equivalent to exactly −273.15°C or −459.67°F
Examples of absolute zero in a Sentence
Recent Examples on the Web
The technology is still in its early stages, and its hardware requires precise operating conditions, such as cryogenic cooling near absolute zero.
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Jason Snyder, Forbes, 9 Jan. 2025
To maintain the delicate quantum states of their qubits, they must be cooled to near absolute zero—colder than outer space—using advanced cryogenic systems.
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Sandy Carter, Forbes, 16 Dec. 2024
First, take a 15-kilogram bar of beryllium (or some similar material) and cool it almost all the way to absolute zero, the minimum possible temperature.
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Charlie Wood, Quanta Magazine, 30 Oct. 2024
They're also designed to operate at cryogenic temperatures close to absolute zero (around minus 459 degrees Fahrenheit).
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Kate Irwin, PCMAG, 23 Oct. 2024
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Word History
First Known Use
1798, in the meaning defined above
Dictionary Entries Near absolute zero
Cite this Entry
“Absolute zero.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/absolute%20zero. Accessed 9 Feb. 2025.
Kids Definition
absolute zero
noun
: a hypothetical temperature that has never been reached, represents no heat at all, and is equal to approximately −273.15°C or −459.67°F
Medical Definition
absolute zero
noun
: a theoretical temperature characterized by complete absence of heat and equivalent to exactly −273.15°C or −459.67°F
More from Merriam-Webster on absolute zero
Britannica.com: Encyclopedia article about absolute zero
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