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单词 triad
释义

triad

[ trahy-ad, -uhd ]
/ ˈtraɪ æd, -əd /
SEE SYNONYMS FOR triad ON THESAURUS.COM

noun

a group of three, especially of three closely related persons or things.
Chemistry.
  1. an element, atom, or group having a valence of three.Compare monad (def. 2), dyad (def. 3).
  2. a group of three closely related compounds or elements, as isomers or halides.
Music. a chord of three tones, especially one consisting of a given tone with its major or minor third and its perfect, augmented, or diminished fifth.
(initial capital letter)Military. the three categories of strategic-nuclear-weapons delivery systems: bombers, land-based missiles, and missile-firing submarines.

Origin of triad

1540–50; <Latin triad- (stem of trias) <Greek triásSee tri-, -ad1

OTHER WORDS FROM triad

tri·ad·ic, adjectivetri·ad·ism, noun

Words nearby triad

triacetic acid, triacid, triacontanol, triacylglycerol, triacylglycerol lipase, triad, triadelphous, triad syndrome, triage, trial, trial and error
Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for triad

British Dictionary definitions for triad (1 of 2)

triad
/ (ˈtraɪæd) /

noun

a group of three; trio
chem an atom, element, group, or ion that has a valency of three
music a three-note chord consisting of a note and the third and fifth above it
an aphoristic literary form used in medieval Welsh and Irish literature
the US strategic nuclear force, consisting of intercontinental ballistic missiles, submarine-launched ballistic missiles, and bombers

Derived forms of triad

triadic, adjectivetriadism, noun

Word Origin for triad

C16: from Late Latin trias, from Greek; related to Greek treis three

British Dictionary definitions for triad (2 of 2)

Triad
/ (ˈtraɪæd) /

noun

any of several Chinese secret societies, esp one involved in criminal activities, such as drug trafficking
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for triad

triad
[ trīăd′, -əd ]

n.

A collection of three things or symptoms having something in common.
The transverse tubule, and the terminal cisternae on each side of it, in a skeletal muscle fiber.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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更新时间:2024/9/25 1:21:19