烟碱酸 yānjiǎnsuān niacin Origin Definitions Defs Strokes Stroke Words Sentences Sents 烟碱 煙鹼 yānjiǎn nicotine nicotine; an alkaloid found in tobacco and some other plants; also known as 尼古丁 nígǔdīng酸 suān noun acid acid, a chemical compound that releases hydrogen ions in water