A series of actions that take place in the course of data processing, each triggered by the previous action in the series.

An electric-power circuit arrangement in which circuit breakers of reduced interrupting ratings are used in the branches, the circuit breakers being assisted in their protection function by other circuit breakers which operate almost instantaneously. Also known as backup arrangement.

See <<avalanche>>

An arrangement of separation devices, such as isotope separators, connected in series so that they multiply the effect of each individual device.

A landform structure formed by gravity collapse, consisting of a bed that buckles into a series of folds as it slides down the flanks of an anticline.

A small waterfall or series of falls descending over rocks.

The emission of a series of photons by a quantum system, such as an atomic nucleus or a laser, in an excited state, accompanying transitions of the system to successively lower excited states, until the system reaches the ground state.