Triad
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2008-07-15T08:39:17Z
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A '''triad''', a group of [[3 (number)|three]], may refer to:
*[[Triad (Greek philosophy)]], Pythagorean symbol for the number three
*[[Triad (music)]], set of three notes, most commonly forming a diatonic tertian chord
*[[Triad (relationship)]], term for a relationship between three people
*[[Triad (religious)]] three deities commonly associated together; three deities forming a group with common associations; three deities thought of as three phases of one deity; or three entities thought of as aspects of one deity (e.g. the "great goddess" or [[Triple Goddess]] - grandmother, mother, and daughter or, crone, matron, and maiden, and in [[Catholicism]] - father, son, spirit); [[triple deities]]
*[[Triad (sociology)]], term for a group of three people as a unit of study
*[[Welsh Triads]], collections of Medieval Welsh legend and history
*[[Triplism]] frequently occurring in religion and mythology
==Medicine==
In medicine, a triad often refers to three [[symptom]]s of a [[syndrome]], such as the following.
*[[Triad (anatomy)]], structure in skeletal muscles, formed by a T tubule surrounded by sarcoplasmic reticulum
*[[Catalytic triad]], biochemical term for three amino acid residues found within some proteases
*[[Beck's triad (cardiology)]], three typical symptoms of cardiac tamponade
*[[Beck's cognitive triad]], three types of negative thought present in depression
*[[Charcot's triad]], either of two sets of clinical signs, relating to multiple sclerosis or ascending cholangitis
*[[Cushing's triad]], a set of three signs showed by patients with head injuries
*[[Dieulafoy's triad]], a classic sign of acute appendicitis
*[[Female athlete triad]], three symptoms of low energy availability in female athletes
*[[Hutchinson's triad]], a common pattern of presentation for congenital syphilis
*[[Meckler's triad]], used to diagnose [[Boerhaave syndrome]]
*[[Virchow's triad]], a set of three signs attributed to Rudolf Virchow describing the pathogenesis of venous thrombosis
*[[Whipple's triad]], a set of three conditions proving hypoglycemia as the cause of a person's symptoms
*[[MacDonald triad]], three childhood traits that are associated with anti-social personality disorder
==Organizations, brands, and products==
*[[Triad (environmental science)]], management system for environmental cleanup
*[[Triad (underground societies)]], Chinese organized crime groups
*[[National_Grid_UK#Triad_Demand|Triad Demand]], UK electrical power demand measurement
==Placenames==
*The [[Piedmont Triad]], North Carolina, USA region
==Computing==
*[[Triad (computers)]], group of three phosphor dots used in some computer monitors
*[[Triad C64]], Commodore 64 cracking group
*''[[Rise of the Triad]]'', computer game
==Popular culture==
*[[Triad (Battlestar Galactica)]], fictional ball sport
*[[The Triad (Charmed)]], fictional group of three powerful demons
*[[Triiad]], a fictional alien species from the television series ''Hypernauts''
*[[Triad (superhero)]], alias of fictional DC Comics super hero Triplicate Girl
*Triad, a 1967 song by [[David Crosby]], with versions recorded by Jefferson Airplane on ''[[Crown of Creation]]'', by [[Crosby, Stills & Nash (and Young)|Crosby, Stills Nash & Young]] on ''[[Four Way Street]]'', and by the Byrds on ''[[The Notorious Byrd Brothers]]''
*[[Triad (album)]], a 1976 album by [[Spontaneous Combustion (band)|Spontaneous Combustion]].
*Triad, a song by [[Tool (band)|Tool]] from their 2001 album ''[[Lateralus]]''
*The Hong Kong Triad, a song by Thievery Corporation from their 2000 album ''[[The Mirror Conspiracy]]''
==See also==
[[National Grid (UK)#Triad demand|National Grid (UK): Triad demand]]
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