manhattan project

Noun
  1. A former United States executive agency that was responsible for developing atomic bombs during World War II (synset 108139743)
    is a type of: executive agency - an agency of the executive branch of government
    is a part of: executive branch, executive office of the president - the branch of the United States government that is responsible for carrying out the laws
  2. Code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II (synset 100821893)
    is an instance of: labor, project, task, undertaking - any piece of work that is undertaken or attempted

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