trey
/treɪ/noun
(pl. -eys)
1- a thing having three of something, in particular三重物, 尤指：
1.1
- a playing card or dice with three spots三点的牌; 三点的骰子。
1.2
- US (in basketball) a shot scoring three points〈美〉（篮球用语）三分球。
词源
late Middle English: from Old French trei 'three', from Latin tres.