烟碱素 yānjiǎnsù niacin Definitions Defs Origin 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素 sù noun element (bound form) essential part; element; constituent; basic nature
