ultracold
/ˌʌltrəˈkoʊld/
adjective
- Extremely cold; often used in science to describe temperatures near absolute zero, or informally to mean very cold.
- The lab uses ultracold lasers to cool atoms to near absolute zero.
- The ultracold storage unit keeps the vaccines at a stable low temperature.
- We had an ultracold winter this year, with temperatures dropping to -40 degrees.