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ρ (EN)
字母,符号

字母 “ρ”

ρ, rho
  1. 希腊字母表的第十七个字母
    In the Greek alphabet, ρ comes after π.

符号 “ρ”

ρ
  1. (物理学中)密度的符号
    The density of an object is often represented by ρ in physics equations.
  2. (在数学中)表示半径或其他量的变量
    In spherical coordinates, ρ denotes the distance from the origin.