ρ (EN)

letter, symbol

letter “ρ”

1. the 17th letter of the Greek alphabet
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   In the Greek alphabet, ρ comes after π.

symbol “ρ”

1. (in physics) symbol for density
   The density of an object is often represented by ρ in physics equations.
2. (in mathematics) a variable representing radius or other quantities
   In spherical coordinates, ρ denotes the distance from the origin.