noun
seven pairs; winning hand of seven pairs
A mahjong hand consisting of seven pairs of identical tiles. A special hand that does not follow the usual four melds and a pair structure.
from Chinese qī duì zi
彼はチートイツで上がった。
He won with a seven-pair hand.
七対子は門前でしか作れない役だ。
Seven pairs is a hand that can only be made with a concealed hand.
対々和 is a hand of four triplets and a pair, while 七対子 is seven pairs.
From Chinese 七對子 (qī duì zi), literally 'seven pairs'.