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Definition of Chain reaction
1. Noun. A series of chemical reactions in which the product of one is a reactant in the next.
2. Noun. A self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others.
Generic synonyms: Nuclear Reaction
Medical Definition of Chain reaction
1. A reaction in which a product reacts and thus continues the reaction. (09 Oct 1997)