(n): one of the elements that collectively form a system of numeration
(n): one of three offspring born at the same time from the same pregnancy
(n): a person's brother or sister
(n): a set of three similar things considered as a unit
(n): a group of things of the same kind that belong together and are so used
Merriam-Webster says "triplet" has two syllables. However, drumming students are frequently taught to vocalise "trip-puh-lit" when learning to play this rhythm of three notes evenly spaced in one count.