triad


tri·ad

noun \ˈtrī-ˌad also -əd\

: a group of three usually related people or things

: a secret Chinese criminal organization

Full Definition of TRIAD

1
:  a union or group of three :  trinity
2
:  a chord of three tones consisting of a root with its third and fifth and constituting the harmonic basis of tonal music
tri·ad·ic \trī-ˈa-dik\ adjective
tri·ad·i·cal·ly \-di-k(ə-)lē\ adverb

Examples of TRIAD

  1. <a triad of candlesticks on the mantle>

Origin of TRIAD

Latin triad-, trias, from Greek, from treis three
First Known Use: 1546

tri·ad

noun \ˈtrī-ˌad also -əd\   (Medical Dictionary)

Medical Definition of TRIAD

1
: a union or group of three <a triad of symptoms>
2
: a trivalent element, atom, or radical
tri·ad·ic \trī-ˈad-ik\ adjective

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