fatty acid

noun

1

: any of numerous saturated aliphatic monocarboxylic acids C_nH_2n+1COOH (such as acetic acid) including many that occur naturally usually in the form of esters in fats, waxes, and essential oils

2

: any of the saturated or unsaturated monocarboxylic acids (such as palmitic acid) usually with an even number of carbon atoms that occur naturally in the form of glycerides in fats and fatty oils

Examples of fatty acid in a Sentence

Recent Examples on the Web

Salmon is also high in omega-3 fatty acids, which may promote brain health. —Julie Marks, Verywell Health, 21 Feb. 2025

Blood sample analysis also revealed positive changes in glucose and fatty acid levels, which could contribute to improved cognitive performance. —Tom Rogers, Newsweek, 21 Feb. 2025

For example, fish rich in omega-3 fatty acids can benefit brain health and function, reduce inflammation, and support heart health.17 The latest Dietary Guidelines for Americans recommend that the average healthy adult consumes seafood at least twice weekly. —Chelsea Rae Bourgeois, Rdn, Health, 20 Feb. 2025

For instance, vegan diets can be low on levels of protein, vitamin B12, iron, calcium, omega-3 fatty acids, vitamin D and zinc, says Young. —Daryl Austin, USA TODAY, 11 Feb. 2025

Word History

First Known Use

1838, in the meaning defined at sense 1

Rhymes for fatty acid

• antacid
• placid

Kids Definition

fatty acid

noun

: any of numerous acids that contain only carbon, hydrogen, and oxygen and occur naturally in fats and various oils

Medical Definition

fatty acid

noun

1

: any of numerous saturated aliphatic acids C_nH_2n+1COOH (as lauric acid) containing a single carboxyl group and including many that occur naturally usually in the form of esters in fats, waxes, and essential oils

2

: any of the saturated or unsaturated organic acids (as palmitic acid) that have a single carboxyl group and usually an even number of carbon atoms and that occur naturally in the form of glycerides in fats and fatty oils