Englishfor English speakers
circulation
Noun
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Circulation is the act of moving in a circle.
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Circulation is the act of passing from place to place or person to person.
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If something is in circulation, it is being passed around within a system.
The new bills will come into circulation next Friday.
quantum
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noun
(physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory)
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noun
a discrete amount of something that is analogous to the quantities in quantum theory