Rho
#'''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 polar 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 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 da:Rho de:Rho es:Ro