also: げはい
noun
bone tile; ivory tile
Refers to tiles made of bone or ivory, especially those used in Chinese dominoes or similar games. The term is somewhat specialized and may not be widely known outside of gaming or historical contexts.
中国の伝統的なドミノには、牙牌と呼ばれる骨製の牌が使われることがある。
In traditional Chinese dominoes, bone tiles called 牙牌 are sometimes used.
From 牙 (ga, 'ivory, tusk') + 牌 (hai, 'tile, plaque'). The reading げはい is a less common variant, possibly influenced by historical or dialectal pronunciation.