niacin

noun ni·a·cin \ ˈnī-ə-sən \

Definition of niacin

:an acid C6H5NO2 of the vitamin B complex found widely in animals and plants and used especially against pellagra; also :nicotinamide called also nicotinic acid

Recent Examples of niacin from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'niacin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of niacin

nicotinic acid + 1-in


NIACIN Defined for English Language Learners

niacin

noun

Definition of niacin for English Language Learners

  • : a type of natural substance (called a vitamin) that is found in certain foods and that helps your body to be healthy


Medical Dictionary

niacin

noun ni·a·cin \ ˈnī-ə-sən \

medical Definition of niacin

:a crystalline acid C6H5NO2 that is a member of the vitamin B complex occurring usually in the form of a complex of niacinamide in various animal and plant parts (as blood, liver, yeast, bran, and legumes) and is used especially to lower LDL and triglyceride levels in the blood and to treat pellagra called also nicotinic acid

Learn More about niacin


Seen and Heard

What made you want to look up niacin? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

readily predictable

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!