Triad or triade may refer to: * a group of

three 3 is a number, numeral, and glyph. 3, three, or III may also refer to: * AD 3, the third year of the AD era * 3 BC, the third year before the AD era * March, the third month Books * '' Three of Them'' (Russian: ', literally, "three"), a 1901 ...

Businesses and organisations

Triad (American fraternities) The term Triad is used to designate certain historic groupings of seminal college fraternities in North America. Union Triad The Union Triad is a group of the three oldest existing Greek-letter social fraternities in North America that were founded ...

, certain historic groupings of seminal college fraternities in North America *

Triad (organized crime) A triad ( zh , t=三合會 , s=三合会 , cy=sāam hahp wúi , j=saam1 hap6 wui6‑2 , hp=sān hé huì , first=t,j ) is a Chinese transnational organized crime syndicate based in Greater China and has outposts in various countries with signific ...

, a Chinese transnational organized crime syndicate * Triad Broadcasting, an American radio station operator * Triad High School (disambiguation), several uses *

Triad Hospitals Triad Hospitals was a hospital operator based in Plano, Texas. Spun off from Hospital Corporation of America in 1999, it acquired Quorum Health Group in 2000 to become the third-largest investor-owned hospital group. It was merged into Community H ...

, an American hospital operator *

Triad International Triad International is a multi-national private investment corporation that was owned by the late Adnan Khashoggi. Its investments include many notable properties and businesses throughout the World. The company consisted of subsidiary companies, i ...

, a multi-national private investment corporation * Triad Racing Technologies, a body parts and chassis supplier for NASCAR teams *

Triad Securities Triad Securities Corp. was founded in 1976 as a full-service agency only discount brokerage firm. Currently, it has its corporate headquarters in the Wall Street area of New York City. Triad’s products and services comprise three categories: p ...

, a finance company *

Triad Strategies Triad Strategies is a bipartisan public affairs firm headquartered in Harrisburg, PA, with offices in Philadelphia and Pittsburgh. Triad provides government affairs, advocacy and communications, and economic development services to organizations se ...

, an American lobbying firm *

Triad Theater The Triad Theater, formerly known as Palsson's Supper Club, Steve McGraw's, and Stage 72, is a cabaret-style performing arts venue located on West 72nd Street on New York's Upper West Side. The theatre has been the original home to some of the lon ...

, a performing arts venue in New York City

Arts and entertainment

Fictional characters

* The Triad (''Charmed''), fictional characters in the TV series *

Triad (superhero) Triplicate Girl (Luornu Durgo) is a fictional character, a superhero in the 30th and 31st centuries of the and a member of the Legion of Super-Heroes. She has also had the aliases Duo Damsel, Triad, Una, Duplicate Damsel and Duplicate Girl. Pub ...

, alias of DC Comics' Luornu Durgo

Film and television

* ''Triad'' (film), a 1938 German film * ''

Triads, Yardies and Onion Bhajees ''Triads, Yardies and Onion Bhajees'' is a 2003 British crime film directed by Sarjit Bains, telling the story of a hitman working in London. The film stars real life ex-gangster and underworld don Dave Courtney. Brainchild of Manish Patel, w ...

'', a 2003 British film * ''Triad'', a 2012 Hong Kong film starring William Chan

Set Theory

A Triad is a Set with Three Elements. See: https://mathworld.wolfram.com/Triad.html

Music

Triad (music) In music, a triad is a set of three notes (or " pitch classes") that can be stacked vertically in thirds.Ronald Pen, ''Introduction to Music'' (New York: McGraw-Hill, 1992): 81. . "A triad is a set of notes consisting of three notes built on succ ...

, chord consisting of root, third and fifth * ''The Triad'' (album), by Pantha du Prince, 2016 *

Triad (band) Triad were a Swedish rock band that comprised Lasse Lindbom, Niklas Strömstedt and Janne Bark. Triad is most famous for their 1987-1988 Swedish number-one single hit " Tänd ett ljus" ("''Light a Candle''"), one of the Swedish classic songs fo ...

, a Swedish music group * "Triad", a track on Enya's 1987 album ''

Enya Enya Patricia Brennan (; ga, Eithne Pádraigín Ní Bhraonáin; born 17 May 1961), known professionally by the mononym Enya, is an Irish singer, songwriter, and musician known for modern Celtic music. She is the best-selling Irish solo arti ...

'' * "Triad" (Pitchshifter song), 1993 * "Triad" (David Crosby song), 1967 * "Triad", a song by Tool from their 2001 album ''

Lateralus ''Lateralus'' () is the third studio album by American rock band Tool. It was released on May 15, 2001, through Volcano Entertainment. The album was recorded at Cello Studios in Hollywood and The Hook, Big Empty Space, and The Lodge, in Nor ...

'' * “Triad”, a song by '' Jefferson Airplane'' from their 1968 album “Crown Of Creation”

Other uses in arts and entertainment

* ''Triad'', a 2013 video game by Anna Anthropy * ''Triad'' (sculpture), a 1980 outdoor sculpture by Evelyn Franz *

Welsh Triads The Welsh Triads ( cy, Trioedd Ynys Prydein, "Triads of the Island of Britain") are a group of related texts in medieval manuscripts which preserve fragments of Welsh folklore, mythology and traditional history in groups of three. The triad is a ...

, collections of medieval Welsh legend and history *

Triads of Ireland The title ''Trecheng Breth Féne'' "A Triad of Judgments of the Irish", more widely known as "The Triads of Ireland", refers to a miscellaneous collection of about 256 Old Irish triads (and some numerical variants) on a variety of topics, such as ...

, a collection of Old Irish writings

Science and technology

Triad (anatomy) In the histology of skeletal muscle, a triad is the structure formed by a T tubule with a sarcoplasmic reticulum (SR) known as the terminal cisterna on either side. Each skeletal muscle fiber has many thousands of triads, visible in muscle fibe ...

, structure in skeletal muscles, formed by a T tubule surrounded by sarcoplasmic reticulum *

Triad (computing) In computing and telecommunications, a unit of information is the capacity of some standard data storage system or communication channel, used to measure the capacities of other systems and channels. In information theory, units of information a ...

, 3 bits of information storage *

Triad (environmental science) The Triad is an approach by the United States Environmental Protection Agency to decision-making for hazardous-waste site cleanup. During the late 1990s, technology advocates from the environmental sector in the United States developed the approa ...

, management system for environmental cleanup *

Triad (monitors) In cathode-ray tube (CRT), or computer display terminology, a triad is a group of 3 phosphor dots coloured red, green, and blue on the inside of the CRT display of a computer monitor or television set. By directing differing intensities of elect ...

, group of three phosphor dots used in some computer monitors * Triad, a brand name of the combination medication butalbital/acetaminophen * List of medical triads, tetrads, and pentads

Other uses

Triad (religion) A triad, in a religious context, refers to a grouping of three gods, usually by importance or similar roles. A triad of gods were usually not considered to be one in the same being, or different aspects of a single deity as in a Trinity or Triple ...

, a grouping of three gods * Triad (relationship), or ''ménage à trois'' *

Triad (sociology) Triad refers to a group of three people in sociology. It is one of the simplest human groups that can be studied and is mostly looked at by microsociology. The study of triads and dyads was pioneered by German sociologist Georg Simmel at the en ...

, a group of three people as a unit of study *

The Triad (mountain) The Triad is a mountain with three peaks located in the North Cascades, in Skagit County, Washington, Skagit County of Washington (U.S. state), Washington state. Situated in North Cascades National Park, The Triad is positioned west of the ...

, in Washington, U.S. *

Trichotomy (philosophy) A trichotomy is a three-way classificatory division. Some philosophers pursued trichotomies. History Important trichotomies discussed by Aquinas include the causal principles (agent, patient, act), the potencies for the intellect (imagination ...

, often called triads * HMS ''Triad'' (N53), T-class submarine of the UK Royal Navy *

Piedmont Triad The Piedmont Triad (or simply the Triad) is a metropolitan region in the north-central part of the U.S. state of North Carolina anchored by three cities: Greensboro, Winston-Salem, and High Point. This close group of cities lies in the Piedmon ...

, or simply the Triad, a region of North Carolina, U.S. * Triad Islands, in Antarctica * A nuclear triad