triad

triad
1. A collection of three things having something in common. 2. The transverse tubule and the terminal cisternae on each side of it in skeletal muscle fibers. 3. SYN: portal t.. 4. The father, mother, and child relationship projectively experienced in group psychotherapy. [G. trias (t.-), the number 3, fr. treis, three]
- acute compression t. the rising venous pressure, falling arterial pressure, and decreased heart sounds of pericardial tamponade. SYN: Beck t..
- Beck t. SYN: acute compression t..
- Charcot t. 1. in multiple (disseminated) sclerosis, the three symptoms: nystagmus, tremor, and scanning speech; 2. combination of jaundice, fever, and upper abdominal pain that occurs as a result of cholangitis.
- Fallot t. SYN: trilogy of Fallot.
- hepatic t. SYN: portal t..
- Kartagener t. SYN: Kartagener syndrome.
- portal t. branches of the portal vein, hepatic artery, and the biliary ducts bound together in the perivascular fibrous capsule or portal tract as they ramify within the substance of the liver. SYN: hepatic t., t. (3).
- Saint t. the concurrence of hiatal hernia, diverticulosis, and cholelithiasis.

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tri·ad 'trī-.adalso -əd n
1) a union or group of three <a \triad of symptoms>
2) a trivalent element, atom, or radical
tri·ad·ic trī-'ad-ik adj

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n.
(in medicine) a group of three united or closely associated structures or three symptoms or effects that occur together. A portal triad in a portal canal of the liver consists of a branch of the portal vein, a branch of the hepatic artery, and an interlobular bile tubule.

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tri·ad (triґad) [L. trias: Gr. trias group of three] 1. any trivalent element. 2. a group of three entities or objects, as an association of three symptoms.

Medical dictionary. 2011.

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Look at other dictionaries:

  • triad — [trī′ad΄] n. [< LL trias (gen. triadis) < Gr trias (gen. triados) < treis,THREE] 1. a group of three persons, things, ideas, etc.; trinity 2. a musical chord of three tones, esp. one consisting of a root tone and its third and fifth: a… …   English World dictionary

  • Triad — Tri ad, n. [L. trias, adis, Gr. ?, ?, fr.?, ?, three: cf. F. triade. See {Three}, and cf. {Trias}, {Trio}.] 1. A union of three; three objects treated as one; a ternary; a trinity; as, a triad of deities. [1913 Webster] 2. (Mus.) (a) A chord of… …   The Collaborative International Dictionary of English

  • triad — ► NOUN 1) a group or set of three connected people or things. 2) (also Triad) a Chinese secret society involved in organized crime. DERIVATIVES triadic adjective. ORIGIN Greek trias, from treis three …   English terms dictionary

  • triad — (= triad junction) The junction between the T tubules and the sarcoplasmic reticulum in striated muscle …   Dictionary of molecular biology

  • triad — англ. [тра/йэд] triade ит. [триа/дэ], фр. [триад] Triade нем. [триа/дэ] трезвучие …   Словарь иностранных музыкальных терминов

  • triad — 1540s, group or set of three, from L.L. trias (gen. triadis), from Gk. trias (gen. triados), from treis three (see THREE (Cf. three)). Musical sense of chord of three notes is from 1801 …   Etymology dictionary

  • Triad — A triad, a group of three, may refer to:Computers*Triad, group of three phosphor dots used in some computer monitors *Triad C64, Commodore 64 cracking group * Rise Of The Triad , a computer game *TriadCity, a MUD with strong literary… …   Wikipedia

  • triad — triadic, adj. triadism, n. /truy ad, euhd/, n. 1. a group of three, esp. of three closely related persons or things. 2. Chem. a. an element, atom, or group having a valence of three. Cf. monad (def. 2), dyad (def. 3) …   Universalium

  • triad — [[t]tra͟ɪæd[/t]] triads (The spelling Triad is also used for meaning 1.) 1) N COUNT: usu pl, oft N n The Triads were Chinese secret societies in old China that were often associated with organized crime. Chinese gangs from Hong Kong, known as the …   English dictionary

  • triad — Synonyms and related words: arpeggio, broken chord, chord, clover, common chord, concento, concord, consonant chord, deuce ace, diminished seventh chord, dominant chord, enharmonic, leash, major triad, minor chord, set of three, seventh chord,… …   Moby Thesaurus

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