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Answer for the clue "Self-maintaining process ", 14 letters:
chain reaction

Word definitions for chain reaction in dictionaries

Wiktionary Word definitions in Wiktionary
n. 1 (context physics English) A nuclear reaction in which particles produced by the fission of one atom trigger fissions of other atoms. 2 (context idiomatic English) A series of events, each one causing the next.

Wikipedia Word definitions in Wikipedia
Chain Reaction is a 1996 American science fiction thriller film directed by Andrew Davis , starring Keanu Reeves , Morgan Freeman , Rachel Weisz , Fred Ward , Kevin Dunn and Brian Cox . It presents a fictional account of the invention of a new non-contaminating ...

WordNet Word definitions in WordNet
n. a series of chemical reactions in which the product of one is a reactant in the next a self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others

Usage examples of chain reaction.

He told me there would be this big event, this precipitating event, which would set off a chain reaction that would set America back on course.

Containment fields ruptured, matter met antimatter, and a deadly chain reaction tore through every warhead aboard the targeted ships.

He knew that all you had to do was stimulate atoms to get a chain reaction going.

It's sort of a chain reaction, with me on the end and nobody to pass it along to.

I should be able to get a high positive 'k' factor on the chain reaction-if it works at all.

It was all the human race needed -- a chance to use what could turn into a self-sustaining chain reaction.

Something had attacked the shop, powerful enough to set off a chain reaction in the protecĀ­.