also: ホンちゅう
noun
red dragon tile
Mahjong tile; one of the three dragon tiles. Often called 中 (チュン) for short.
from Chinese hóng zhōng
紅中をポンして、役を確定させた。
I called pon on the red dragon tile and secured my hand.
From Chinese 紅中 (hóng zhōng), literally 'red center', referring to the red dragon tile in mahjong.