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Theta (uppercase Θ or Ө, lowercase θ (which resembles digit 0 with horizontal line) or ϑ; θῆτα, thē̂ta,; Modern: θήτα|, thī́ta) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth. [1]

80 relations: Agathodaemon, Analysis of algorithms, Ancient Egypt, Ancient Greek, Angle, Archaic Greece, Aspirated consonant, Astrology, Baryon, Bayer designation, Big O notation, Bilabial clicks, Capital punishment, Celtic cross, Chebyshev function, Chromosome, Circled dot, Cosmos, Cyrillic script, Death, Direct sum, DNA replication, Early Cyrillic alphabet, Earth, Egyptian hieroglyphs, Egyptians, Electroencephalography, Ennead, Euphemism, Exclusive or, Fita, Gaulish language, Greek alphabet, Greek language, Greek numerals, Greeks (finance), Helios, International Phonetic Alphabet, International System of Units, Isopsephy, Item response theory, Θ (set theory), John the Lydian, Life, Likelihood function, Linear A, Linear B, Meteorology, Modern Greek, Mutation rate, ..., Ordinal collapsing function, Ordinal number, Oxford University Press, Particle physics, Pentaquark, Petrus de Dacia (mathematician), Phoenician alphabet, Population genetics, Porphyry (philosopher), Potential temperature, Resurrection, Romanization of Greek, Sherd, Skull and crossbones (symbol), Solomon Feferman, Symbol, Tau, Temperature, Tensor product, Teth, Thanatos, Theta, Theta function, Transport phenomena, Unicode, Voiced dental fricative, Voiceless alveolar stop, Voiceless dental fricative, Watterson estimator, Weiser Antiquarian Books. Expand index (30 more) »


An agathodaemon (ἀγαθοδαίμων, agathodaímōn) or agathos daemon (ἀγαθὸς, agathós daímōn, "noble spirit") was a spirit (daemon) of the vineyards and grainfields in ancient Greek religion.

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Analysis of algorithms

In computer science, the analysis of algorithms is the determination of the amount of resources (such as time and storage) necessary to execute them.

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Ancient Egypt

Ancient Egypt was a civilization of ancient Northeastern Africa, concentrated along the lower reaches of the Nile River in what is now the modern country of Egypt.

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Ancient Greek

Ancient Greek includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.

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In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

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Archaic Greece

The Archaic period in Greece (800 BC – 480 BC) is a period of ancient Greek history that followed the Greek Dark Ages.

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Aspirated consonant

In phonetics, aspiration is the strong burst of breath that accompanies either the release or, in the case of preaspiration, the closure of some obstruents.

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Astrology consists of several pseudoscientific systems of divination based on the premise that there is a relationship between astronomical phenomena and events in the human world.

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A baryon is a composite subatomic particle made up of three quarks (as distinct from mesons, which are composed of one quark and one antiquark).

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Bayer designation

A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.

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Big O notation

In mathematics, big O notation describes the limiting behavior of a function when the argument tends towards a particular value or infinity, usually in terms of simpler functions.

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Bilabial clicks

The labial or bilabial clicks are a family of click consonants that sound something like a smack of the lips.

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Capital punishment

Capital punishment, death penalty or execution is punishment by death.

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Celtic cross

Celtic cross (cros Cheilteach, crois Cheilteach, crosh Cheltiagh, croes Geltaidd, krows keltek, kroaz geltek) is a symbol that combines a cross with a ring surrounding the intersection; the cross' stem being longer than the other three intersection.

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Chebyshev function

In mathematics, the Chebyshev function is either of two related functions.

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A chromosome (''chromo-'' + ''-some'') is a packaged and organized structure containing most of the DNA of a living organism.

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Circled dot

The circled dot, circumpunct, or circle with a point at its centre is an ancient symbol.

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The cosmos is the universe regarded as a complex and orderly system; the opposite of chaos.

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Cyrillic script

The Cyrillic script is an alphabetic writing system employed across Eastern Europe and north and central Asia.

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Death is the termination of all biological functions that sustain a living organism.

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Direct sum

The direct sum is an operation from abstract algebra, a branch of mathematics.

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DNA replication

DNA replication is the process of producing two identical replicas from one original DNA molecule.

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Early Cyrillic alphabet

The Early Cyrillic alphabet is a writing system that was developed during the late ninth century on the basis of the Greek alphabet for the Orthodox Slavic population in Europe.

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Earth (also the world, in Greek: Gaia, or in Latin: Terra), is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only astronomical object known to accommodate life.

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Egyptian hieroglyphs

Egyptian hieroglyphs (Egyptian: mdw·w-nṯr, "god's words") were a formal writing system used by the ancient Egyptians that combined logographic and alphabetic elements.

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Egyptians (مَصريين; مِصريّون) are an ethnic group and the citizens of Egypt sharing a common culture and a variety of Arabic.

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Electroencephalography (EEG) is typically a non-invasive (however invasive electrodes are often used in specific applications) method to record electrical activity of the brain along the scalp.

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The Ennead (ἐννεάς, meaning a collection of nine things) was a group of nine deities in Egyptian mythology.

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A euphemism is a generally innocuous word or expression used in place of one that may be found offensive or suggest something unpleasant.

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Exclusive or

Exclusive disjunction or exclusive or is a logical operation that outputs true only when both inputs differ (one is true, the other is false).

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Fita (italics) is a letter of the Early Cyrillic alphabet.

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Gaulish language

Gaulish is an ancient Celtic language that was spoken in parts of Europe as late as the Roman period.

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Greek alphabet

The Greek alphabet has been used to write the Greek language since the 8th century BC.

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Greek language

Greek or Hellenic (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to the southern Balkans, the Aegean Islands, western Asia Minor, parts of northern and Eastern Anatolia and the South Caucasus, southern Italy, Albania and Cyprus.

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Greek numerals

Greek numerals are a system of representing numbers using the letters of the Greek alphabet.

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Greeks (finance)

In mathematical finance, the Greeks are the quantities representing the sensitivity of the price of derivatives such as options to a change in underlying parameters on which the value of an instrument or portfolio of financial instruments is dependent.

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Helios (Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek) was the personification of the Sun in Greek mythology.

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International Phonetic Alphabet

The International Phonetic Alphabet (unofficially—though commonly—abbreviated IPA)"The acronym 'IPA' strictly refers to the 'International Phonetic Association'.

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International System of Units

The International System of Units (Système International d'Unités, SI) is the modern form of the metric system, and is the most widely used system of measurement.

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Isopsephy (ἴσος isos meaning "equal" and ψῆφος psephos meaning "pebble") is the Greek word for the practice of adding up the number values of the letters in a word to form a single number.

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Item response theory

In psychometrics, item response theory (IRT) also known as latent trait theory, strong true score theory, or modern mental test theory, is a paradigm for the design, analysis, and scoring of tests, questionnaires, and similar instruments measuring abilities, attitudes, or other variables.

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Θ (set theory)

In set theory, Θ (pronounced like the letter theta) is the least nonzero ordinal α such that there is no surjection from the reals onto α. If the axiom of choice (AC) holds (or even if the reals can be wellordered) then Θ is simply (2^)^+, the cardinal successor of the cardinality of the continuum.

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John the Lydian

John the Lydian or John Lydus (Ἰωάννης Λαυρέντιος ὁ Λυδός; Joannes Laurentius Lydus) was a 6th-century Byzantine administrator and writer on antiquarian subjects.

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Life is a characteristic distinguishing physical entities having biological processes (such as signaling and self-sustaining processes) from those that do not,The American Heritage Dictionary of the English Language, 4th edition, published by Houghton Mifflin Company, via.

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Likelihood function

In statistics, a likelihood function (often simply the likelihood) is a function of the parameters of a statistical model.

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Linear A

Linear A is one of two currently undeciphered writing systems used in ancient Greece (Cretan hieroglyphic is the other).

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Linear B

Linear B is a syllabic script that was used for writing Mycenaean Greek, the earliest attested language form of Greek.

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Meteorology is the interdisciplinary scientific study of the atmosphere.

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Modern Greek

Modern Greek (νέα ελληνικά or νεοελληνική γλώσσα "Neo-Hellenic", historically and colloquially also known as Ρωμαίικα "Romaic" or "Roman", and Γραικικά "Greek") refers to the dialects and varieties of the Greek language spoken in the modern era.

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Mutation rate

In genetics, the mutation rate is a measure of the rate at which various types of mutations occur over time.

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Ordinal collapsing function

In mathematical logic and set theory, an ordinal collapsing function (or projection function) is a technique for defining (notations for) certain recursive large countable ordinals, whose principle is to give names to certain ordinals much larger than the one being defined, perhaps even large cardinals (though they can be replaced with recursively large ordinals at the cost of extra technical difficulty), and then “collapse” them down to a system of notations for the sought-after ordinal.

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Ordinal number

In set theory, an ordinal number, or ordinal, is the order type of a well-ordered set.

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Oxford University Press

Oxford University Press (OUP) is the largest university press in the world, and the second-oldest, after Cambridge University Press.

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Particle physics

Particle physics is the branch of physics that studies the nature of the particles that constitute matter (particles with mass) and radiation (massless particles).

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A pentaquark is a subatomic particle consisting of four quarks and one antiquark bound together.

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Petrus de Dacia (mathematician)

Petrus de Dacia, also called Philomena and Peder Nattergal (Peter Nightingale), was a Danish scholar who lived in the 13th century.

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Phoenician alphabet

The Phoenician alphabet, called by convention the Proto-Canaanite alphabet for inscriptions older than around 1050 BC, is the oldest verified alphabet.

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Population genetics

Population genetics is the study of the distribution and change in frequency of alleles within populations, and as such it sits firmly within the field of evolutionary biology.

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Porphyry (philosopher)

Porphyry of Tyre (Πορφύριος, Porphyrios; c. 234 – c. 305 AD) was a Neoplatonic philosopher who was born in Tyre.

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Potential temperature

The potential temperature of a parcel of fluid at pressure P is the temperature that the parcel would acquire if adiabatically brought to a standard reference pressure P_, usually 1000 millibars.

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Resurrection (from Latin resurrectio) is the concept of a living being coming back to life after death.

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Romanization of Greek

Romanization of Greek is the transliteration (letter-mapping) or transcription (sound-mapping) of text from the Greek alphabet into the Latin alphabet.

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In archaeology, a sherd, or more precisely, potsherd, is commonly a historic or prehistoric fragment of pottery, although the term is occasionally used to refer to fragments of stone and glass vessels as well.

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Skull and crossbones (symbol)

A skull and crossbones is a symbol consisting of a human skull and two long bones crossed together under the skull.

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Solomon Feferman

Solomon Feferman (born December 13, 1928) is an American philosopher and mathematician with works in mathematical logic.

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A symbol is an object that represents, stands for or suggests an idea, visual image, belief, action or material entity.

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Tau (uppercase Τ, lowercase τ; ταυ) is the 19th letter of the Greek alphabet.

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A temperature is an objective comparative measure of hot or cold.

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Tensor product

In mathematics, the tensor product, denoted by, may be applied in different contexts to vectors, matrices, tensors, vector spaces, algebras, topological vector spaces, and modules, among many other structures or objects.

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Teth, also written as or Tet, is the ninth letter of the Semitic abjads, including Phoenician Ṭēt, Hebrew Ṭēt, Aramaic Ṭēth, Syriac Ṭēṯ, and Arabic.

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In Greek mythology, Thanatos (Θάνατος "Death", from θνῄσκω thnēskō "to die, be dying") was the daemon personification of death.

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Theta (uppercase Θ or Ө, lowercase θ (which resembles digit 0 with horizontal line) or ϑ; θῆτα, thē̂ta,; Modern: θήτα|, thī́ta) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth.

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Theta function

Jacobi's original theta function \theta_1 with u.

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Transport phenomena

In engineering, physics and chemistry, the study of transport phenomena concerns the exchange of mass, energy, and momentum between observed and studied systems.

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Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.

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Voiced dental fricative

The voiced dental fricative is a type of consonantal sound, used in some spoken languages.

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Voiceless alveolar stop

The voiceless alveolar stop is a type of consonantal sound used in many spoken languages.

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Voiceless dental fricative

The voiceless dental non-sibilant fricative is a type of consonantal sound used in some oral languages.

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Watterson estimator

In population genetics, the Watterson estimator is a method for estimating the population mutation rate, \theta.

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Weiser Antiquarian Books

Weiser Antiquarian Books is the oldest occult bookstore in the United States.

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Redirects here:

0-, Cursive theta, Theta (Greek), Theta (letter), Thita, \theta, Θ, Θήτα, Θῆτα, ϴ.


[1] https://en.wikipedia.org/wiki/Theta

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