Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: French
Origin: triade, from Latin, from Greek, from treis 'three'

triad

 noun
     
Related topics: Crime
tri‧ad [countable]
1SCC a Chinese secret criminal group
2 a group of three people or things that are related or similar to each other
Definition from the Longman Dictionary of Contemporary English
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