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Concentration or concentrate can refer to:
Science, engineering, and technology
- Concentration, in chemistry, the measure of how much of a given substance there is mixed with another substance
- Mass concentration (astronomy), a region of a planet or moon's crust that is denser than average
- Number density in physics, chemistry, and astronomy
- Ore concentrate, in extractive metallurgy, the product of benefaction with a higher grade than the feed.
- Concentration (game), the card game
- Concentration (game show), American television game show
- Concentration (album), an album by Machines of Loving Grace
- Concentration 20, an album by Namie Amuro
- "Concentrate," a song by American rapper Xzibit, from his album Full Circle
- Concentrate (screenplay), a never-filmed 1958 screenplay by Russian film director Andrei Tarkovsky
- Attentional control, the cognitive process of controlling the focus of attention
- Samadhi (Buddhism), mental concentration in Buddhism
- Market concentration, in economics, the number and production share of firms in a market (or industry)
- Concentration ratio, in economics, a measure of market concentration.
- Concentration camp, a detention center created for specific groups of people, usually during wartime
- A term used at Brown University, Colgate University, Columbia University, Harvard College, and Saint Olaf College to refer to a type of academic major
- Force concentration, and concentrate, in military tactics, the practice of concentrating military units
- Concentrate Design, designer of products to help children concentrate
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