煙
酸
煙
酸
Definitions2 characters (vitamin B3)/3-Pyridinecarboxylic C6H5NO2/nicotinic
Usage•••frequent
Pronunciations
煙
酸
As word
1niacin (vitamin B3)/3-Pyridinecarboxylic acid C6H5NO2/nicotinic acid
2niacin (vitamin B3)/3-Pyridinecarboxylic acid C6H5NO2/nicotinic acid