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1. Beginning; Origin
Noun
#255657
1. Beginning; Origin
1. atomic reactor; nuclear reactor
1. atomic energy; nuclear power
1. nucleus; atomic nucleus
1. nuclear power plant; nuclear power generation
2. primary (e.g. primary immunodeficiency syndrome)
1. origin; beginning
2. primeval; primordial
1. atom
1. atomic bomb; A-bomb
1. capital; principal
1. nuclear submarine