absolute zero


absolute zero

noun

: the temperature that is believed to be the lowest possible temperature

Full Definition of ABSOLUTE ZERO

:  a theoretical temperature characterized by complete absence of heat and motion and equivalent to exactly −273.15°C or −459.67°F

First Known Use of ABSOLUTE ZERO

1808

absolute zero

noun    (Medical Dictionary)

Medical Definition of ABSOLUTE ZERO

: a theoretical temperature characterized by complete absence of heat and equivalent to exactly −273.15°C or −459.67°F

absolute zero

noun    (Concise Encyclopedia)

Temperature at which a thermodynamic system (see thermodynamics) has the lowest energy, 0 kelvin (K). It corresponds to 459.67°F (273.15°C) and is the lowest possible temperature theoretically achievable by a system. A gas at constant pressure contracts as the temperature is decreased. A perfect gas would reach zero volume at absolute zero. However, a real gas condenses to a liquid or a solid at a temperature higher than absolute zero. At absolute zero, the system's molecular energy is minimal and none is available for transfer to other systems. The Kelvin temperature scale has absolute zero as its zero point, and its fundamental unit is the kelvin.

Browse

Next Word in the Dictionary: absolution
Previous Word in the Dictionary: absolute weight
All Words Near: absolute zero

Seen & Heard

What made you want to look up absolute zero? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More