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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

@@ Line 1: / Line 1: @@
-'''[[ΔT]]''' is the time difference between [[Universal Time]], a time scale based on the [[Earth's_rotation#Changes_in_rotation|Earth's non-uniform rotation]], and [[Terrestrial Time]], a uniform time scale currently based on the caesium atomic clock.
+The symbols '''Δt''' and '''ΔT''' (spoken as "'''delta T'''") are commonly used in a variety of contexts.
-'''&Delta;t''' and '''&Delta;T''' may also refer to:
+==Time==
-The term is used to represent other time differences:
+* [[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 interval of time used in determining [[Velocity#Average_velocity|velocity]]
-* The increment between [[Neural_coding#Time-dependent_firing_rate|successive nerve impulses]].
+* The increment between [[Neural coding#Time-dependent firing rate|successive nerve impulses]]
+==Temperature==
-The term is also used to represent differences or changes of temperature:
+* To mean a difference in [[temperature]] including [[thermodynamic temperature]], may occur in
-* In discussions of [[Climate sensitivity|climate change]].
+** Discussions of [[Climate sensitivity|climate change]]
-* In discussions of [[Heat transfer coefficient|heat transfer]].
+** Discussions of [[Heat transfer coefficient|heat transfer]]
-* In discussions of the effects of [[Microscale_thermophoresis#Technology|thermal gradients]].
+** Discussions of the effects of [[Microscale thermophoresis#Technology|thermal gradients]]
+== See also ==
-{{dab}}
+* [[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"
+{{disambiguation}}