double-sided wait
In mahjong, a wait for either of two different tiles to complete a chow that will finish the hand. Often used in the compound 両面待ち (リャンメンまち).
See also: リャンメン待ち (リャンメンまち)
This hand is a double-sided wait; if a 2-man or 5-man comes, I can win.
inferior double-sided shape; incomplete chow with pair overlap; tile pattern 3345 or 3455
double-sided wait; two-sided wait
From Chinese mahjong terminology, using 両 (both) and 面 (side).