from the GNU version of the Collaborative International Dictionary of English.
- proper noun (U. S. History) A former US agency that was responsible for developing atomic bombs during World War II.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II
- noun a former United States executive agency that was responsible for developing atomic bombs during World War II
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