
nongovernmental American organization of scientists and engineers, established March 3, 1863, by act of Congress to serve as an official adviser to ... [2 related articles]
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http://www.britannica.com/eb/a-z/n/10

A united states organization of distinguished scientists and engineers established for the purpose of investigating and reporting upon any subject of art or science as requested by any department of government. The national research council organised by nas serves as the principal operating agency to stimulate and support research. ... (12 Dec 1998...
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http://www.encyclo.co.uk/local/20973

National Academy of Sciences: One of the National Academies. Created in 1863 by a congressional charter approved by President Abraham Lincoln at the height of the Civil War.
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http://www.medterms.com/script/main/art.asp?articlekey=18440

[
n] - an honorary American society of scientists created by President Lincoln during the American Civil War
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http://www.webdictionary.co.uk/definition.php?query=National%20Academy%20of
noun an honorary American society of scientists created by President Lincoln during the American Civil War
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https://www.encyclo.co.uk/local/20974

(NAS) NAS is a private, nonprofit corporation established by Congress to investigate and report on science and technology at the request of the federal government. The National Research Council (NRC) is a part of the NAS and has reported on public health problems such as chemical contamination of drinking water.
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https://www.health.ny.gov/environmental/glossary/

a private organization, created by an act of Congress (1863), that furthers science and advises the U.S. government on scientific and technical issues. Abbr.: N.A.S., NAS
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https://www.infoplease.com/dictionary/national-academy-of-sciences
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