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- Dictionarydensity/ˈdɛnsɪti/
noun
- 1. the degree of compactness of a substance: "a reduction in bone density"
- 2. a measure of the amount of information on a storage medium: "a low-density floppy disk"
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noun
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Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: where ρ is the density, m is the mass, and V is the volume. Wikipedia