triad
//ˈtraɪ.æd//
Noun
triadSingular
triadsPlural
1
A group or set of three connected or related people, things, or ideas.
The triad of mind, body, and spirit is essential for overall well-being.
2
A Chinese secret society involved in organized crime, originally formed as a patriotic organization.
The police arrested several members of a triad involved in illegal gambling.
3
In music, a chord consisting of three notes, typically a root, a third, and a fifth.
A major triad consists of a root, a major third, and a perfect fifth.