Rho (disambiguation)

Rho (Ρ or ρ) is a letter of the Greek alphabet. Rho also may refer to:

Guanosine-triphosphate hydrolyzing enzymes of the Rho subclass

• Rho family of GTPases
• RHOA
• RHOB
• RhoC

Roles of the Greek letter Ρ or ρ as a symbol

in mathematics

• Spectral radius in a spherical coordinate system
• Pollard's rho algorithm
• Pollard's rho algorithm for logarithms

in physics

• Density of a material
• Volume charge density
• Resistivity of a material
• Rho meson, any of $\rho^+$, $\rho^0$ & $\rho^-$

in biology

• Rho factor protein in RNA transcription termination
• Subjective night, the inactivity period of a Circadian rhythm
• Ecology, population damping ratio where ρ = λ1 / |λ2|.

in statistics

• Spearman's rank correlation coefficient, a non-parametric measure of correlation
• Pearson product-moment correlation coefficient, a common measure of the correlation between two variables

in other fields

• The reaction constant in the Hammett equation in chemistry
• Rho (finance)
• Rho Cassiopeiae, star

Toponyms

• Rho, Lombardy, a town in Italy
• Rho Island, a.k.a. Ro, Greece
• Rho River, Italian tributary of the Dora di Bardonecchia

Acronyms and abbreviations RHO

• Right-Hand Opponent, in contract bridge
• Red Hot Organization, HIV/AIDS-related charity
• Rhodes International Airport, in Greece

Other

• Giacomo Rho, Italian Jesuit missionary

See also

• Ro (disambiguation)