A grouping of three.
on a CRT display, a group of three neighbouring phosphor dots, coloured green, red, and blue.
A chord consisting of a root tone, the tone two degrees higher, and the tone four degrees higher in a given scale.
A branch of a Chinese underground criminal society, mostly based in Hong Kong.
A word of three syllables.
The practice of three people having sex, i.e. having threesomes.
The practice of two people having sex while a third person watches (and may or may not take part).