/fast"bree"deuhr, fahst"-/, Physics.
a breeder reactor in which there is no moderator and fission is caused by high-energy neutrons.
Also, fast breeder reactor.
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fast-breeder reactor noun
A nuclear reactor using fast neutrons which produces at least as much fissionable material as it uses
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Main Entry: ↑fast
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fast-breeder reactor UK US noun [countable] [singular fast-breeder reactor plural fast-breeder reactors]
a large machine used for producing nuclear energy
Useful english dictionary. 2012.