Absolute Zero

Definition

Absolute zero is the lowest possible temperature where all molecular motion stops (except quantum fluctuations). It's equal to 0 Kelvin, -273.15 degrees Celsius, or -459.67 degrees Fahrenheit.

Related terms

Kelvin: The SI unit of temperature, starting from absolute zero.

Thermometer:

A device used to measure temperature.

Quantum Mechanics: The branch of physics dealing with the behavior of particles at the atomic and subatomic level, where energy is quantized.