Rho Symbol
About Rho Symbol
Ρ is the Rho Symbol, the seventeenth letter of the Greek alphabet in its uppercase form. Ρ denotes density in physics, the rho meson in particle physics, and correlation in some statistical notations.
【Pronunciation】 In English, Ρ is most often pronounced ROH (IPA: /roʊ/). This is simply the anglicized name of the Greek letter.
The uppercase Rho Symbol Ρ is written as a distinct capital Greek glyph and is assigned codepoint U+03A1 in the Greek and Coptic Unicode block. In plain or sans-serif fonts it can be mistaken for the Latin letter P, so verify the typeface or context.
【Historical Origin】 Like every Greek letter, Ρ was adapted from a Phoenician consonant and entered mathematical and scientific notation through the work of ancient Greek scholars, remaining in continuous use to the present day.
【Common Uses】 Ρ is highly active across disciplines and frequently appears alongside other Greek capitals such as Δ (Δ), Σ (Σ), Π (Π) and Ω (Ω) in formulas, papers, and engineering drawings. Its clear shape and long tradition make it a standard symbol in many fields.
How to Type Rho Symbol
Windows Input
Method 1: Hold Alt and type 929 on the numeric keypad, then release Alt to get Ρ.
Mac Input
Method 2: Press Control + Command + Space to open the Character Viewer, search for "greek" or "Rho Symbol", then select Ρ.
HTML/CSS Input
HTML: Ρ or Ρ; CSS: content: "\03A1";
LaTeX Input
The capital Rho Symbol Ρ has no dedicated LaTeX command because it is identical to the Latin capital P; simply type P in math mode to produce Ρ.
Rho Symbol FAQ
How is Ρ pronounced?
The English pronunciation of Ρ is ROH (IPA: /roʊ/). It is the anglicized name of the Greek letter, used directly rather than described as "uppercase Ρ".
What is the difference between Ρ and the Latin letter P?
Ρ (U+03A1) is a Greek capital letter, whereas P is a Latin letter; their codepoints and glyphs differ. In a proper typeface Ρ and P are clearly distinct, but in plain text or sans-serif fonts they can be confused, so rely on context.
How do I type Ρ in Word, web pages, and LaTeX?
On Windows use Alt+929 on the numeric keypad; on Mac open the Character Viewer and search "greek" or "Rho Symbol"; on the web use the HTML entity Ρ; in LaTeX simply type the letter P.