D defs.my
Entry 1 sense Webster, 1913

Trey

/trā/ · IPA /tɹeɪ/
01 n. Three, at cards, dice, or dominoes; a card, die, or domino of three spots or pips.
  1. 1.
    Three, at cards, dice, or dominoes; a card, die, or domino of three spots or pips.
    “Seven is my chance and thine is cinq and trey.” Chaucer.