Rho

Rho is a Greek noun representing the eighteenth letter of the Greek alphabet, often used in scientific and mathematical notation. In pronunciation, it is typically treated as the proper name of the letter, pronounced with a short, rounded vowel followed by a trilled or tapped 'r' in many contexts, depending on language conventions. In scholarly writing, 'Rho' may also denote the density parameter in physics or the correlation coefficient in statistics, though context usually clarifies meaning.