triad
nounUK /ˈtraɪ.æd/
US /ˈtraɪ.æd/
A triad is a group of three things or three people.
The three friends formed a close triad who did everything together.
SYNONYMS
OTHER MEANINGS
2. In music, a triad is a chord made of three notes.
The song begins with a simple major triad.
3. A triad can be a secret group of three people, often in organized crime.
The police broke up a criminal triad operating in the city.
4. In chemistry, a triad is a set of three related elements.
The scientist studied the triad of elements in the periodic table.