• Rho (upper case Ρ, lower case ρ) is a letter of the Greek alphabet. See Rho (letter).

• The lower-case letter ρ is used as the symbol for the radius in a spherical coordinate system in mathematics.

• The lower-case letter ρ is used as the symbol for the density of a material in physics.

• The lower-case letter ρ is used as the symbol for the resistivity of a material in physics.

• The lower-case letter ρ is the name of the three varieties of rho meson ( $\backslash rho^+$, $\backslash rho^0$, $\backslash rho^-$).

• The lower-case letter ρ is used as the symbol for the Rho factor protein in RNA transcription termination.

• Rho is also the name of a town near Milan, in Italy

• A small GTPase, which is important in migration and stress fibre formation

• A Large format Industrial Ink-Jet printer from Durst AG, the Durst Rho. (See also the Durst Lambda)

• The rate at which the price of a derivative changes relative to a change in the risk-free rate of interest. Rho measues the sensitivity of an option or options portfolio to a change in interest rate.

• Rho is a Greek islet famous for its single resident, Despina Achladioti.

Rho