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ΔT is a symbol for the change, Δ, in a time period, T. A particular use is as a measure of the long-term drift in the length of a day

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).

This disambiguation page lists articles associated with the title ΔT.
If an internal link led you here, you may wish to change the link to point directly to the intended article.

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+'''ΔT''' is a symbol for the [[finite difference|change]], Δ, in a time [[frequency|period]], ''T''. A particular use is as a measure of the long-term [[ΔT|drift in the length of a day]]
-'''[[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''' are commonly used in other contexts as follows.