in music, a tuplet with a duration two-thirds (2/3) the regular note value duration in simple and/or duple meter. An irrational rhythm, it may also be used as a polyrhythm when played against the regular duration. In relation to triple time duple meter rhythms would be duples.
in quantum mechanics, a spin triplet is a set of three quantum states of a system, each with total spinS = 1. The system could consist of a single spin 1 W or Z boson, two identical spin 1/2 fermions, or more than two particles in a state with a total spin of 1 (such as the electrons in an oxygenmolecule).