triplet triplet /ˈtrɪplət/

noun

1. A set of three similar things considered as a unit  ( triad , trio , triple , triplet )
   a set of three similar things considered as a unit
   
2. One of three offspring born at the same time from the same pregnancy  ( triplet )
   one of three offspring born at the same time from the same pregnancy
   
3. The cardinal number that is the sum of one and one and one  ( deuce-ace , III , leash , tercet , ternary , ternion , terzetto , threesome , tierce , 3 , three , trey , triad , trine , trinity , trio , triplet , troika )
   the cardinal number that is the sum of one and one and one
    I have three cats
   I have three cats