It is one of the earliest alphabets to include vowel and consonant letters in Greek. It appeared between the 9th and 8th centuries BC. The modern version has 24 letters (7 vowels; the rest are consonants).
| Upper Case Letter | Lower Case Letter | Greek Letter Name | English Equivalent |
|---|---|---|---|
| Α | α | Alpha | a |
| Β | β | Beta | b |
| Γ | γ | Gamma | g |
| Δ | δ | Delta | d |
| Ε | ε | Epsilon | e |
| Ζ | ζ | Zeta | z |
| Η | η | Eta | h |
| Θ | θ | Theta | th |
| Ι | ι | Iota | i |
| Κ | κ | Kappa | k |
| Λ | λ | Lambda | l |
| Μ | μ | Mu | m |
| Ν | ν | Nu | n |
| Ξ | ξ | Xi | x |
| Ο | ο | Omicron | o |
| Π | π | Pi | p |
| Ρ | ρ | Rho | r |
| Σ | σ,ς * | Sigma | s |
| Τ | τ | Tau | t |
| Υ | υ | Upsilon | u |
| Φ | φ | Phi | ph |
| Χ | χ | Chi | ch |
| Ψ | ψ | Psi | ps |
| Ω | ω | Omega | o |
If we consider the origin of the Greek alphabet, it is interesting that it is based on the Phoenician alphabet rather than on the writing systems used in ancient Greece. Each letter in the Phoenician alphabet was named after the word it began with. For example, “aleph” meant “bull,” and “bet” meant “house.” Other letters have similar examples.
The Greek alphabet, derived from the Phoenician alphabet, served as the basis for several alphabets that later spread across Europe and the Middle East. These also include the Latin and Cyrillic alphabets. However, the Greek alphabet’s influence extended beyond this. Its letters were also transformed into mathematical symbols and designations for elementary particles.
At the beginning of the last century, an abbreviated version of the alphabet was used, omitting some letters. Let’s consider the letters of the Greek alphabet in more detail. They are interesting not only from a linguistic and historical point of view. Many modern sciences and branches of practical knowledge use Greek letters, from medicine to aircraft construction.
Greek letters alphabets
Α α (άλφα, alpha)
Although this letter is pronounced like the Russian “a,” it comes from the Phoenician “aleph,” which means “bull.” Its shape even resembles a bull’s head.
This letter covers many areas. For example, in medicine, it denotes the alpha rhythm. Geometry is not lagging; alpha denotes plane angles. Astronomy also uses this letter. Not without reason, it is the name of the brightest star in the constellation Centaurus. In physics, this letter denotes heat transfer coefficients and angular acceleration. It also denotes alpha particles. In short, this letter has a very wide range of applications.
Β ϐ (βῆτα, beta)
The Greek “beta” also has Phoenician origins. In the Cyrillic alphabet, it comes from two letters: B and C. Most people have probably heard of beta particles and beta radiation. However, this letter is used for more than just those phenomena. In geometry, it follows α to denote angles. Beta also designates the second-brightest luminary in a constellation. Its use in astronomy is quite broad.
The term “beta” also appears in programming. This term can refer to any IT product under development.
Γ γ (γάμα, gamma)
This letter has a distinctive Phoenician origin. In the Ancient Greek alphabet, it denoted a sound similar to the Russian “g.” The Cyrillic letter “g” is also derived from the Greek gamma. In physics, this letter represents gamma radiation. It also denotes specific variables in mathematical contexts.
In astronomy, gamma refers to the third brightest luminary in a constellation.
Δ δ (δέλτα, delta)
The Phoenician and Ancient Greek delta served as the origin of the Cyrillic letter “D.” The Phoenician letter originally meant “door.” It can also mean the entrance to a tent.
In physics, this letter denotes certain variables. In mathematics, it denotes the Dirac delta function. Delta also denotes deviation in engineering mechanics. It is also used in chemistry and astronomy. For example, astronomers use it to refer to the brightness of celestial objects, such as the fourth star in a constellation.
These are not the only examples of the letter delta in the theoretical and practical applications of many sciences and disciplines.
Ε ε (έψιλον, epsilon)
Here, the Phoenician letter “he” becomes the sound “e.” Several related Cyrillic vowels are derived from it. Note that the letters epsilon and upsilon (Ε ε and ϒ υ) are sometimes confused. However, they are two completely different letters. Epsilon is used in many sciences and fields. These include physics, chemistry, math, astronomy, and programming, as mentioned above.
This letter is usually used in set theory, automata theory, tensor calculus, angular acceleration in physics, and the empty string in computer science. In astronomy, ε designates the 5th brightest star in a constellation.
Ζ ζ (ζῆτα, zeta)
The Phoenician letter from which the word zeta was derived was called “zen” or “zain.” Originally, a sound similar to “ZZ” was used to represent it. However, the modern Greek alphabet has changed somewhat, and zeta is now pronounced as a ringing “z.” The letter is actively used not only by mathematicians but also by specialists in hydraulics and geodesy.
In mathematics, the Riemann zeta function is a key concept. Colloidal chemists use this letter when discussing zeta potential. In hydraulics, it describes the resistance coefficient.
Η η (ήτα, eta)
The Phoenician letter “hit” served as the basis for the letter “ita” in the Greek alphabet. The variety of fields in which this letter is used is astounding. These include quantum physics, thermodynamics, and even cosmetology.
In optics, the letter measures the optical medium. In thermodynamics, it denotes the efficiency of heat machines. It is also used in particle physics, quantum field theory, astronomy, and several other sciences and disciplines.
Θ ϑ (phita, theta)
Like all the previous letters, it is of Phoenician origin. It comes from the Phoenician letter theta. In medicine, this letter refers to the theta rhythm. It is also widely used in electrodynamics.
Physicists use this letter to denote the Debye temperature. In geometry, it denotes the zenith angle in a spherical coordinate system. In linear algebra, theta is used as one notation for null matrices. The cheta function is known to all experts in mathematics.
Ι ι (γιώτα, iota)
This letter, derived from the Phoenician “iodus”, is known even to many who are not familiar with the Greek alphabet. The saying “do not change an iota” is mentioned in the Bible. It has also entered the culture of many countries, as this aphorism succinctly conveys that no change is necessary.
The Latin letters I and J are derived from this letter. A similar letter also appeared in the Aramaic alphabet. By the way, this letter appears in the quote above from the Bible for a reason. It was indeed the smallest letter in the alphabet.
Κ κ (κάππα, κάπα, kappa)
It originates from the Phoenician “kaf.” Greek kappa gave rise to the Cyrillic and Latin K. By the way, despite their similarity, the letters are spelled differently. Kappa is a symbol in chemistry, physics, and even differential geometry.
In chemistry, kappa denotes the Debye parameter; in physics, it denotes the heat transfer coefficient. In differential geometry, it denotes a curve’s curvature. In short, this letter has many applications.
Λ λ (λάμδα, λάμβδα, lambda)
This letter comes from the Phoenician “lamed” or “lambda.” As in many other examples, the Greek alphabet influenced the Cyrillic alphabet and the origin of the letter “l.” The scope of this letter’s use today is astounding. It refers to bacteriophages in virology. It is also used in linear algebra and linguistics. In physics, lambda particles are known. In airplane design, this letter denotes wing extension, and in cartography, it denotes a place’s longitude.
Historical sources show that this letter appeared on the shields of Sparta’s warriors. Thus, this letter was used both in antiquity and today.
Μ μ (μῦ, mu)
The Phoenician “mem” underlies the origins of the Greek mu, as well as the Cyrillic and Latin letters M.
This letter is used in measure theory. It is also used in dynamical systems theory. These are examples from mathematics. In physics, the letter mu denotes the coefficient of dry friction, the primary particle muon, and many other quantities and phenomena. Thus, this Greek letter is very versatile.
Ν ν (νῦ, nu)
In the ancient Phoenician alphabet, it sounded like “nuon.” In the Cyrillic alphabet, the letter “n” is derived from it. The pronunciation in both the Greek and Cyrillic alphabets is identical.
In physics and chemistry, this letter denotes the amount of matter. It also stands for wave frequency, other repetitive processes, and the elementary particle neutrino. In fluid dynamics, nu denotes the kinematic viscosity index.
Ξ ξ (ξι, xi)
Based on the Phoenician “sameh” or “semk”.This letter has no analog in the modern Cyrillic alphabet. Only in the Church Slavonic script has the letter survived, where it corresponds to the sound “ks” in oral speech.
This letter denotes a random value, but this use is not exhaustive. It is also used in hydraulics and nuclear reactor theory.
Ο ο (όμικρον, omicron)
It is based on the Phoenician letter “ain.” This letter has no exact Cyrillic counterpart; it corresponds in part to the letters “U” and “O.” Its pronunciation is close to the Russian sound “o.”
In astronomy, omicron is widely used to designate a measure of star brightness. Many people have probably heard the phrase “Omicron of Andromeda” or some other luminary.
This designation is also used in medicine. For example, in November 2021, the WHO gave this name to a new coronavirus strain.
Π π (πι, pi)
Derived from the Phoenician “pe,” a precursor to the Cyrillic and Latin letter P. The sound is pronounced “p.” This letter is used in many fields of knowledge. Its most famous use is to denote a mathematical constant. The 16th letter of the Greek alphabet also denotes potential energy. In dimensional analysis, the P-theorem exists.
One elementary particle in physics is called a “pion” (or p-meson). In macroeconomics, this letter denotes the inflation rate, and in astronomy, it denotes the parallax effect.
Ρ ρ (ρω, rho)
It comes from the Phoenician “rosh”. This letter is used in both exact and natural sciences. It is widely used in mathematics, chemistry, and physics. For example, this letter denotes the distance between objects in a metric space. It also denotes a coefficient indicating the correlation between random variables.
In physics, it denotes matter density and the resistivity index.
Σ σ/ς (σίγμα, sigma)
It is pronounced with the “s” sound and derived from the Phoenician “shin.” The prototype of this letter is the Cyrillic letter C and the Latin letter S. It often denotes variables in various sciences and industries. For example, sigma is used in electronics and quantum mechanics. It is also used in medicine, chemistry, algebra, and even mechanics.
For example, in math, sigma represents sums. In physics, sigma-hyperons are a type of elementary particle. By the way, Greek letters commonly denote elementary particles, as you can see here and in the examples above.
Τ τ (ταυ, tau)
The letter “taw” comes from the Phoenician “tau” in the Greek alphabet and is pronounced “t” in spoken language. Similar letters appear in the Cyrillic and Latin alphabets.
We see this letter quite often in mechanics, mathematics, and chemistry. But perhaps even more often, it is used in astronomy to designate luminaries in constellations. However, the letter is not limited to this. It is even used to designate intervals between stations in the railroad industry.
In the New Greek version, this letter is called “taf”.
ϒυ (ύψιλον, upsilon)
It is based on the Phoenician letter “vav.” In the Cyrillic alphabet, “izhitsa” is derived from this letter. It also indirectly influenced the appearance of the letters U and Y. In some cases, this sound is pronounced as “i” or “u” (this happens often). But when vowels appear on both sides of this letter in oral speech, it becomes the “v” sound.
Φ φ (φι, phi)
This is one of the few letters of the Greek alphabet whose origin is not Phoenician. In principle, its origin is unknown to this day. In spoken language, this sound is pronounced as “ph.”
This letter has many uses across fields. It denotes the golden ratio, a term used by mathematicians, architects, and art historians.
It is also used in electrical engineering, physics, and chemistry. For example, in physics, it refers to magnetic flux, light flux, and radiation flux. Even in internal ballistics, this letter denotes the coefficient of fictivity.
Χ χ (χῖ, χι, chi)
The ancient Phoenician alphabet will not be mentioned here either. This is not strange, since Ancient Greece had no such letter either. It was added to the New Greek alphabet. It can be pronounced with an “h” or a “ch”.
Topology, chemistry, and physics use this letter as a symbol in their respective fields.
Ψ ψ (ψι, psi)
Here, we will also talk about a letter of the New Greek alphabet that did not exist in Ancient Greece. Despite this, it appears in many fields and disciplines. First, Church Slavonic writing is worth mentioning. Also, do not forget that the supergolden section is denoted precisely by the letter “psi.”
This letter is also included in the names of important sciences and fields such as psychology, psychotherapy, and psychiatry. Derivatives of these terms also contain a similar beginning (psychodiagnosis, psychocorrection, etc.).
Ω ω (ὦμέγα, omega)
This letter comes from the Phoenician “ein.” In the Cyrillic prototypes, it is “omega” and “from”. The letter “omega” differs from “omicron” (short “o”) in that it conveys the long variant of this sound.
The letter that completes the alphabet is traditionally associated with an ending. The Bible mentions Alpha and Omega, signifying a beginning and an end.
Geometry and physics use this letter as a symbol. In ballistics, it stands for the mass of a charge.
These are the letters of the modern Greek alphabet. Many of them are of ancient origin; others came later. Most denote a wide variety of fields of knowledge.
Archaic letters
(These letters were used to write numbers.)
The following are examples of letters not used in the modern Greek alphabet. However, their historical significance makes them worth considering.
Ϝ, ϝ (digamma or vav, δίγαμμα or ϝαῦ)
Like epsilon, it is derived from the Phoenician “vav.” Like other archaic letters, it is not part of the New Greek alphabet. Historical sources show that digamma existed as early as Homer’s language. The sound itself was used for a long time in the Aeolic dialect. As for the name, digamma means “double gamma” and reflects the letter’s appearance. Although this letter does not exist in the modern Greek alphabet, mathematicians use it to denote the digamma function. Consequently, it has neither disappeared without a trace nor been lost in historical sources.
Ͱ, ͱ (heta, ἧτα)
Geta, unlike digamma, remained part of the archaic culture and the ancient Greek alphabet. It is derived from the Phoenician “heta.” It is pronounced as a semi-open long consonant “x.”
Ϻ, ϻ (san, ϻάν or σαν)
It is based on the Phoenician “tsadi.” Around the 4th century BC, this letter disappeared from the ancient Greek alphabet. The reason is quite simple and practical. It was supplanted by the letter “sigma,” which is phonetically similar. Thus, there was no need to keep two letters that partially duplicated each other.
Ϙ, ϙ or Ϟ, ϟ (koppa, ϙόππα or κόππα)
Koppa is a letter derived from the Phoenician “kufr.” In oral speech, it conveyed an explosive, muffled consonant sound. For a long time, it was used to write the number “90”. This is due to the peculiarities of the Greek alphabetic numbering system.
Another interesting fact concerns the letter “koppa.” It was the symbol of the famous Greek city of Corinth. That is why this letter was used to write its name.
Ͳ, ͳ or Ϡ, ϡ (sampi, σαμπί)
This letter is also not used in the modern Greek alphabet. In the alphabetic number system, it represents the number “900”. It derives from the ancient letter “san.” Interestingly, the letter’s original name has not survived. The word “sampi” appeared later, so the letter’s original name is unknown.
Letters used in other languages
One language often influences another as it forms. This applies not only to individual languages but also to dialects. Below are two Greek letters used in other languages.
Ϳ, ϳ (γιότ, yot)
Yot entered Albanian from Greek (specifically the Arnautic dialect). When linguists reconstruct Ancient Greek forms used centuries ago, they also use this letter.
Ϸ, ϸ (σω, sho)
At one time, this letter was understandably added to the Bactrian alphabet. Alexander the Great conquered the area, and Greek culture began to expand into Bactrian culture. It is believed that in oral speech, this letter conveyed the “sh” sound. Its name is conventional. What was the letter’s original name? Unfortunately, it is unknown.
In summary, the Greek alphabet is interesting not only for its history but also for its modernity. It can also be studied through its influence on earlier and present-day alphabets.