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nouna former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States
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Definition that contains aec
- cassia some genus Cassia species often classified as members of the genus Senna or genus Chamaecrista
- genus cassia some genus Cassia species often classified as members of the genus Senna or genus Chamaecrista
- gymnophiona an order of amphibians including caecilians
- caecilian of or relating to or belonging to the family Caeciliidae
- chamaecyparis a genus of Chamaecyparis
- aeciospore spore of a rust fungus formed in an aecium
- genus chamaecyparis a genus of Chamaecyparis
- order gymnophiona an order of amphibians including caecilians
- class amphibia the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians
- aecium fruiting body of some rust fungi bearing chains of aeciospores