absolute zero

Translations
абсолютный ноль
Scientists study the properties of matter at absolute zero.
Учёные изучают свойства материи при абсолютном нуле.
Definitions
Absolute zero is the theoretical lowest temperature possible, at which a system's entropy reaches its minimum value and molecular motion is at its lowest. It is defined as 0 Kelvin, equivalent to -273.15 degrees Celsius or -459.67 degrees Fahrenheit.
Words
absolute

adjective
абсолютный
zero

noun
ноль