唐とう三さん盆ぼんとうさんぼんMeanings1nounhigh-grade white sugar imported from Chinahistorical termHistorical term for a fine white sugar brought from China, often associated with traditional Japanese confectionery. Compare 三盆 (さんぼん), which refers to a domestically produced fine sugar.See also: 三盆唐とう三さん盆ぼんは、江え戸ど時じ代だいに中ちゅう国ごくから輸ゆ入にゅうされた高こう級きゅう砂さ糖