ΔT (disambiguation)

ΔT is the time difference between Universal Time, a time scale based on the Earth's non-uniform rotation, and Terrestrial Time, a uniform time scale currently based on the caesium atomic clock.

The symbols Δt and ΔT are commonly used in other contexts as follows.

Δt, a difference in time, may refer to:

• The interval of time used in determining velocity.
• The increment between successive nerve impulses.

ΔT, a difference in temperature, including thermodynamic temperature, may refer to:

• In discussions of climate change.
• In discussions of heat transfer.
• In discussions of the effects of thermal gradients.

See also Delta time (disambiguation).