triad

n.

1. A group of three.
2. Music. A chord of three tones, especially one built on a given root tone plus a major or minor third and a perfect fifth.
3. A section of a Pindaric ode consisting of the strophe, antistrophe, and epode.

[Late Latin trias, triad-, from Greek, the number three.]

triadic tri·ad'ic (trī-ăd'ĭk) adj.

noun

A group of three individuals: three, threesome, trine, trinity, trio, triple, triumvirate, triune, triunity, troika. See group.

triad, in a Greek lyric poem, a group of three stanzas, of which the first two, called strophē and antistrophē, are symmetrical, i.e. correspond in metre, but the third, called the epode, has a different though related metrical form. If the poem consists of more than one triad the epodes, at least in Pindar, correspond with one another, as do all the strophes and antistrophes. This form of composition, which broke the monotony of a long series of similar stanzas, was thought to have been introduced by Stesichorus and followed by Simonides and Pindar. It is generally believed that lyric poetry written in triadic form was sung and danced by a chorus, whereas monodic lyric was usually sung by an individual (see LYRIC POETRY 1).

In medicine, a group of three closely associated structures, or three symptoms that tend to occur together. See also triad response.

1. an element with a valence of three.
2. a group of three similar bodies, or a complex composed of three items or units.

• t's of the tarsus — the various combinations of (usually three) injuries that occur in trauma to the hock joint, based first on injury to the central tarsal bone.
• Virchow's t. — see virchow's triad.
• Whipple's t. — see whipple's triad.

IN BRIEF: A set of three similar things considered as a unit.

Driving forward is the chief characteristic of western man since the Sumerians. His dread triad of vices is property-holding, voraciousness, and lust. — Antonio

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Dansk (Danish)
n. - trehed, samling af tre, treklang

Nederlands (Dutch)
drie-eenheid

Français (French)
n. - (gén, Chim) triade, (Littérat) trio, (Mus) accord parfait

Deutsch (German)
n. - Dreiheit, Dreiklang, Triade

Ελληνική (Greek)
n. - τριάδα, κινέζικη μαφία, (χημ.) τρισθενές στοιχείο

Italiano (Italian)
triade

Português (Portuguese)
n. - tríade (f)

Русский (Russian)
нечто, состоящее из трех частей, (мат.) триада, (муз.) трезвучие, тайное китайское общество преступников

Español (Spanish)
n. - trío, tríada, elemento trivalente

Svenska (Swedish)
n. - triad, tretal, trefald, treenighet

中文（简体）(Chinese (Simplified))
三人一组, 三合一, 三件一套, 三和弦

中文（繁體）(Chinese (Traditional))
n. - 三人一組, 三合一, 三件一套, 三和弦

한국어 (Korean)
n. - 3인조, 세 개 한 벌, 3가 원소

日本語 (Japanese)
n. - 三つ組, 三つ組元素

العربيه (Arabic)
‏(الاسم) مجموعه من ثلاثه أشخاص أو أشسياء‏

עברית (Hebrew)
n. - ‮שלישייה, חוט משולש‬

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Triad Hydrophilic Wound Dressing	ironman triad treadmill