English numbers (edit)
[a], [b], [c] ←  2 3 4  → 
    Cardinal: three
    Ordinal: third
    Frequency: thrice
    Multiplier: triple, threefold
    Distributive: triply
    Fractional: third
    Number of musicians: trio, triplet

Pronunciation

change

Singular
triplet

Plural
triplets

  1. Triplet is a group or set of three.