[trahy-ad, -uh d]
- a group of three, especially of three closely related persons or things.
- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for triadic
For Kempe's triadic relation in question can be stated, in what he calls its obverse form, in perfectly symmetrical terms.
Truth would be a triadic relation, but of a different sort from that expounded by Mr. Russell.Essays in Experimental Logic
As the total system falls into three parts, so every part of the system follows the triadic law.
- 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
C16: from Late Latin trias, from Greek; related to Greek treis three
- 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
Word Origin and History for triadic
1540s, "group or set of three," from Late Latin trias (genitive triadis), from Greek trias (genitive triados), from treis "three" (see three). Musical sense of "chord of three notes" is from 1801.
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.