榫头 Traditional form: 榫頭 Pinyin (reading): sǔntou Definitions: tenon (wooden projection to fit into a mortise) Characters: 榫 - mortise and tenon; to fit into 头 - head; chief, boss; first, top Traditional characters: 榫 - mortise and tenon; to fit into 頭 - head; chief, boss; first, top