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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: @@
-The symbols '''Δt''' and '''ΔT''' are commonly used in other contexts as follows.
+The symbols '''Δt''' and '''ΔT''' (spoken as "'''delta T'''") are commonly used in a variety of contexts.
-In the context of time, it may refer to:
+==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#Average_velocity|velocity]].
+* The interval of time used in determining [[Velocity#Average_velocity|velocity]]
 * The increment between [[Neural coding#Time-dependent firing rate|successive nerve impulses]]
+==Temperature==
-'''ΔT''', a difference in [[temperature]], including [[thermodynamic temperature]], may occur in:
+* To mean a difference in [[temperature]] including [[thermodynamic temperature]], may occur in
-* Discussions of [[Climate sensitivity|climate change]]
+** Discussions of [[Climate sensitivity|climate change]]
-* Discussions of [[Heat transfer coefficient|heat transfer]]
+** Discussions of [[Heat transfer coefficient|heat transfer]]
-* Discussions of the effects of [[Microscale thermophoresis#Technology|thermal gradients]]
+** Discussions of the effects of [[Microscale thermophoresis#Technology|thermal gradients]]
 == See also ==
-* [[Delta time (disambiguation)]].
+* [[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}}