Definitions

1. noun

A water-soluble vitamin (vitamin B3) that is essential for metabolism and is found in milk, meat, and yeast.

“The doctor prescribed niacin supplements to help the patient lower their cholesterol levels.”

2. noun

A vasodilator (a substance that dilates blood vessels) used in medicine to treat angina pectoris.

“The cardiologist recommended a niacin tablet to alleviate the patient’s chest pain.”

3. chemistry

A chemical compound (C6H5NO2) used in the manufacture of dyes, rubber, and other chemicals.

“The factory produced niacin as a byproduct of their rubber manufacturing process.”