Look up Ρ, ρ in Wiktionary, the free dictionary.

Greek alphabet
Αα Alpha	Νν Nu
Ββ Beta	Ξξ Xi
Γγ Gamma	Οο Omicron
Δδ Delta	Ππ Pi
Εε Epsilon	Ρρ Rho
Ζζ Zeta	Σσ Sigma
Ηη Eta	Ττ Tau
Θθ Theta	Υυ Upsilon
Ιι Iota	Φφ Phi
Κκ Kappa	Χχ Chi
Λλ Lambda	Ψψ Psi
Μμ Mu	Ωω Omega
Obsolete letters
Ϝϝ Digamma	Ϙϙ Qoppa
Ϛϛ Stigma	Ϡϡ Sampi
Ϻϻ San	Ϸϸ Sho
Greek diacritics

For other uses, see Rho.

Rho (uppercase Ρ, lowercase ρ or ϱ) is the 17th letter of the Greek alphabet. In the system of Greek numerals it has a value of 100. It is derived from Semitic Rêš "head" (see Resh). Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... Image File history File links Rho_uc_lc. ... The Greek alphabet is an alphabet that has been used to write the Greek language since about the 9th century BCE. It was the first alphabet in the narrow sense, that is, a writing system using a separate symbol for each vowel and consonant alike. ... Alpha (uppercase Α, lowercase α) is the first letter of the Greek alphabet. ... For other uses, see Nu. ... Beta (upper case Î’, lower case β) is the second letter of the Greek alphabet. ... Look up Ξ, ξ in Wiktionary, the free dictionary. ... Gamma (uppercase Γ, lowercase γ) is the third letter of the Greek alphabet. ... Look up Ο, ο in Wiktionary, the free dictionary. ... Look up Δ, δ in Wiktionary, the free dictionary. ... For other uses, see Pi (disambiguation) Pi (upper case Π, lower case Ï€ or Ï–) is the sixteenth letter of the Greek alphabet. ... Look up Ε, ε in Wiktionary, the free dictionary. ... Zeta or ZETA can refer to: // Zeta (letter), of the Greek alphabet Zeta functions, in mathematics Riemann zeta function Tropical Storm Zeta (2005), formed in December 2005 and lasted through January 2006 Z-pinch, in fusion power Zeta (Mexico), a magazine from Tijuana, Mexico Zeta River, in Montenegro Zeta plain... Look up Σ, σ, Ï‚ in Wiktionary, the free dictionary. ... Look up Η, η in Wiktionary, the free dictionary. ... Look up Τ, Ï„ in Wiktionary, the free dictionary. ... Look up Θ, θ in Wiktionary, the free dictionary. ... Upsilon (upper case , lower case ) is the 20th letter of the Greek alphabet. ... Look up Ι, ι in Wiktionary, the free dictionary. ... Look up Φ, φ in Wiktionary, the free dictionary. ... For other uses, see Kappa (disambiguation). ... Look up Χ, χ in Wiktionary, the free dictionary. ... Look up Λ, λ in Wiktionary, the free dictionary. ... Look up Ψ, ψ in Wiktionary, the free dictionary. ... Look up Îœ, μ in Wiktionary, the free dictionary. ... Look up Ω, ω in Wiktionary, the free dictionary. ... Digamma (upper case , lower case ) is an archaic letter of the Greek alphabet, used primarily as a Greek numeral. ... Qoppa Qoppa is an obsolete letter of the Greek alphabet and has a numeric value of 90. ... Stigma is a ligature of the Greek letters sigma and tau, sometimes used nowadays to represent the Greek numeral 6. ... Sampi (Upper case Ϡ, lower case ϡ) is an obsolete letter of the Greek alphabet and has a numeric value of 900. ... San (uppercase , lowercase ) was a letter of the Greek alphabet, appearing between Pi and Qoppa in alphabetical order, corresponding in position although not in name to the Phoenician tsade. ... Sho (uppercase , lowercase ) was a letter added to the Greek alphabet in order to write the Bactrian language. ... In the Greek alphabet, vowels can carry diacritics, namely accents and breathings. ... 1. ... The Greek alphabet is an alphabet that has been used to write the Greek language since about the 9th century BCE. It was the first alphabet in the narrow sense, that is, a writing system using a separate symbol for each vowel and consonant alike. ... Greek numerals are a system of representing numbers using letters of the Greek alphabet. ... The Proto-Canaanite alphabet is an abjad of twenty-plus acrophonic glyphs, which is found in Levantine texts of the Late Bronze Age (from ca. ... Resh is the twentieth letter of the Phoenician and Hebrew alphabets. ...

Rho is generally classed as a liquid (together with lambda and sometimes the nasals mu and nu), which has important implications for morphology. It is pronounced similarly to the letter r in languages with a Latin-derived alphabet. In polytonic orthography a rho at the beginning of a word is conventionally written with a rough breathing (equivalent to h) — ῥ — and a double rho within a word is written with a smooth breathing over the first rho and a rough breathing over the second — ῤῥ — apparently reflecting an aspirated or voiceless pronunciation in Ancient Greek, hence the various Greek-derived English words which start with rh or contain rrh. The name of the letter is written in Greek as ῥῶ (polytonic) or ρώ (monotonic). Liquid consonants, or liquids, are approximant consonants that are not classified as semivowels (glides) because they do not correspond phonetically to specific vowels (in the way that, for example, the initial in English yes corresponds to ). The class of liquids can be divided into lateral liquids and rhotics. ... The lambda is a unit of measure of volume (symbol λ) equal to one microlitre (1 μL) or one cubic millimetre (1 mm³). Lambda (upper case Λ, lower case λ) is the 11th letter of the Greek alphabet. ... Look up Îœ, μ in Wiktionary, the free dictionary. ... For other uses, see Nu. ... For other uses, see Morphology. ... It has been suggested that Diacritics (Greek alphabet) be merged into this article or section. ... Note: This article contains special characters. ...

Letters that arose from rho include Roman R and Cyrillic Er (Р). Look up R, r in Wiktionary, the free dictionary. ... Er (Р, р) is the eighteenth letter of the Cyrillic alphabet. ...

Common notational uses

lower-case rho ρ

The lower-case rho ρ has a special meaning in the APL programming language. APL (for A Programming Language) is an array programming language based on a notation invented in 1957 by Kenneth E. Iverson while at Harvard University. ...

It is commonly used in physics to represent density (lower-case) and resistivity (lower-case), in mathematics to represent the radius in a system of spherical polar coordinates, in economics to represent the discount rate of future pence cash flows and in molecular biology to represent the Rho protein responsible for termination of RNA synthesis. In such occasions, it is often represented as ϱ ("rho symbol" U+03F1), to avoid confusion with the Latin letter p. This is a discussion of a present category of science. ... For other uses, see Density (disambiguation). ... Electrical resistivity (also known as specific electrical resistance) is a measure of how strongly a material opposes the flow of electric current. ... Euclid, Greek mathematician, 3rd century BC, as imagined by by Raphael in this detail from The School of Athens. ... Remote Authentication Dial In User Service (RADIUS) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... Coordinates are numbers which describe the location of points in a plane or in space. ... ‹ The template below is being considered for deletion. ... Molecular biology is the study of biology at a molecular level. ...

In LaTeX, the symbols are Rho (Ρ), rho (ρ), and varrho (). This article is about the typesetting system. ...

It is used in statistics to represent the correlation coefficient of a population parameter. This article is about the field of statistics. ... In probability theory and statistics, correlation, also called correlation coefficient, is a numeric measure of the strength of linear relationship between two random variables. ...

In an issue of Mad Magazine in the 1960s, there was an article satirizing college fraternities, and the fictitious fraternity in it was named "Rho Rho Rho," using an actual Greek letter but also beinig a play on words--"Row, Row, Row Your Boat." The fraternity, also called P P P or "Tri Rho," was described as thoroughly disreputable. Its emblem was a sword with a wide blade, which appeared on all the fraternity's products. These included a military-style blanket, "Officially sanctioned." (The caption was quick to add, "Officially sanctioned by the fraternity of course; not by any of the military services)." Harvey Kurtzmans cover for the first issue of the comic book Mad Mad is an American humor magazine founded by publisher William Gaines and editor Harvey Kurtzman in 1952. ... While the term fraternity can be used to describe any number of social organizations, including the Lions Club and the Shriners, fraternities and sororities are most commonly known as social organizations of higher education students in the United States and Canada but there are fraternities in the whole world (for... Row, Row, Row Your Boat is an English nursery rhyme, and a popular childrens song/proverb, often sung as a round. ...