Symbols:Greek/Rho

Density

 * $\rho$

Used to denote the density of a given body:
 * $\rho = \dfrac m V$

where:
 * $m$ is the body's mass;
 * $V$ is the body's volume.

Area Density

 * $\rho_A$

Used to denote the area density of a given two-dimensional body:
 * $\rho_A = \dfrac m A$

where:
 * $m$ is the body's mass;
 * $A$ is the body's area.