divergence
In mathematics, a differential operator applied to a three-dimensional vector-valued function. The result is a function that describes a rate of change. The divergence of a vector v is given by 
in which v1, v2, and v3 are the vector components of v, typically a velocity field of fluid flow.
divergence [də′vər·jəns]
(electronics)
The spreading of a cathode-ray stream due to repulsion of like charges (electrons).
(fluid mechanics)
The ratio of the area of any section of fluid emerging from a nozzle to the area of the throat of the nozzle.
(mathematics)
For a vector-valued function, the sum of the diagonal entries of the Jacobian matrix; it is the scalar product of the del operator and the vector.
(meteorology)
The two-dimensional horizontal divergence of the velocity field.
(nucleonics)
In a nuclear reactor, the condition wherein the number of neutrons produced increases in each succeeding generation.
(oceanography)
A horizontal flow of water, in different directions, from a common center or zone.
(physics)
The spreading apart of a beam of particles of light.
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