threesome (
http://definr.com/threesome)
n 1: the cardinal number that is the sum of one and one and one
[syn:
three,
3,
III,
trio,
tierce,
leash,
troika,
triad,
trine,
trinity,
ternary,
ternion,
triplet,
tercet,
terzetto,
trey,
deuce-ace]
2: three people considered as a unit [syn:
trio,
triad,
trinity]