depegram"(Rare). On a tephigram, a curve representing the distribution of the dewpoint for a given sounding of the atmosphere. See thermodynamic diagram.
dependence"See statistical independence.
Adiabat - a line on a tephigram or skew-t chart used to show the thermodynamic path of a moving parcel of air, when it does not gain nor lose any heat.
Meteorologists use radiosondes to measure the environmental lapse rate and compare it to the predicted adiabatic lapse rate to forecast the likelihood that air will rise. Charts of the environmental lapse rate are known as tephigrams.
A good 'first read' when trying to get to grips with the finer points of, for example, the gradient wind equation. Even tells you how to construct your own tephigram! ...
 See also: Meteor, Water, Thunderstorm, Thunderstorms, Surface
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