Circulation
Circulation may refer to:
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Science and technology
- Atmospheric circulation, the large-scale movement of air
- Circulation (physics), the path integral of the fluid velocity around a closed curve in a fluid flow field
- Circulatory system, a biological organ system whose primary function is to move substances to and from cells
- Circulation problem, a generalization of network flow problems
- Circulation (architecture), the flow of people through a building
- Circulation (currency), all currency held by consumers and businesses, but not by financial institutions and governments
- Exhaust gas recirculation, a nitrogen oxide reduction technique used in most gasoline and diesel engines
- Library circulation, the activities around the lending of library books and other material to users of a lending library
- Rhetorical circulation, the ways that texts and discourses move through time and space
Other uses
- Newspaper circulation, the average number of copies of a newspaper distributed on a day
- Magazine circulation, the average number of copies of a periodical distributed per edition/ volume
- Circulation Festival, an annual circus and fire performance festival held in Dunedin, New Zealand
- Circulation (film), a 2008 psychological thriller-fantasy film by Ryan Harper
- Circulation (journal), a journal published by the American Heart Association
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