Rho (Ρ or ρ) is the 17th letter of the Greek alphabet.
Rho or RHO also may refer to:
Use as a symbol Mathematics and statistics ρ, radial coordinate in the polar coordinate system ρ, used in physics instead of r in the spherical coordinate system ρ, radial coordinate in the cylindrical coordinate system ρ, a term in toroidal coordinates ρ, magnetic coordinates in toroidal and poloidal coordinates ρ, spectral radius of a square matrix Pollard's rho algorithm, for integer factorization Pollard's rho algorithm for logarithms ρ, prime constant ρ, plastic ratio, a geometrical proportion ρ, Spearman's rank correlation coefficient in statistics ρ, Pearson correlation coefficient in statistics
Physics ρ, density of a material ρ, volume charge density ρ, electrical resistivity of a material Rho meson, in particle physics
Other fields Rho factor, a bacterial protein Rho family of GTPases, including RhoA, RhoB, and RhoC Rhodopsin, a protein encoded by the RHO gene ρ, reaction constant in the Hammett equation in chemistry ρ, measures sensitivity to the interest rate in finance
Places Rho, Lombardy, Italy Rho railway station Ro, Greece, or Rho, a Greek island Rho Islands, Antarctica Rho River, tributary of the Dora di Bardonecchia, Italy
Other uses Right-hand opponent, in contract bridge Red Hot Organization, an American non-profit Rhodes International Airport, IATA airport code RHO Giacomo Rho (1593–1638), Italian Jesuit missionary in China The Real Housewives, a reality show commonly referred to with the prefix RHO before an abbreviated location
See also
RO (disambiguation)