The symbols Δt and ΔT (spoken as "delta T") are commonly used in a variety of contexts.
Time
- ΔT (timekeeping) the difference between two time scales, Universal Time and Terrestrial Time, which results from a drift in the length of a day
- The interval of time used in determining velocity
- The increment between successive nerve impulses
Temperature
- To mean a difference in temperature including thermodynamic temperature, may occur in
- Discussions of climate change
- Discussions of heat transfer
- Discussions of the effects of thermal gradients
See also
- Delta time (disambiguation)
- Finite difference for the mathematics of the Δ operator
- Delta (letter) for the Greek letter Δ
- ∂ for the mathematical symbol used in the notation "∂T"