noun
chow missing one tile
In mahjong, a pair of tiles that can form a chow (sequence) with one more tile. Compare 順子 (シュンツ), a complete chow.
from Chinese tǎ zi
See also: 順子 (シュンツ)
塔子ができれば、あと一枚で順子になる。
If you have a 塔子, you only need one more tile to make a chow.
順子 is a complete chow (three consecutive tiles), while 塔子 is an incomplete chow missing one tile.
From Chinese 搭子 (tǎ zi), a mahjong term for an incomplete sequence.