五碳糖 wǔtàntáng pentose Definitions Defs Origin Strokes Stroke Words Sentences Sents 五 wǔ numeral five the number five; 5碳 tàn noun carbon nonmetallic element (C); the essential component of organic matter, existing in nature as diamond, graphite, and coal糖 táng noun carbohydrate carbohydrate; saccharide