"Vacuum" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
A space in which the pressure is far below atmospheric pressure so that the remaining gases do not affect processes being carried on in the space.
This graph shows the total number of publications written about "Vacuum" by people in this website by year, and whether "Vacuum" was a major or minor topic of these publications.
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