double-sided wait; two-sided wait
In mahjong, a wait for one of two different tiles to complete a sequence (chow) and finish the hand. The two possible tiles are on opposite sides of a consecutive run, e.g., holding 4-5 and waiting for 3 or 6.
I reached tenpai with a double-sided wait.
A double-sided wait is advantageous because it has many winning tiles.
A wait for either of two pairs to become a triplet. リャンメン待ち completes a sequence, while シャンポン待ち completes a triplet.
Standard mahjong term; katakana リャンメン is the usual spelling for the wait type.
Kanji spelling using 両面 for 'both sides'; less common than the katakana form.
From リャンメン (ryammen, 'both sides', from Chinese 两面) + 待ち (machi, 'wait'). A mahjong term describing a wait that can be completed by two different tiles.