lignan

noun

lig·​nan ˈlig-ˌnan 

: any of a class of propyl phenolic dimers including many found in plants and noted for having antioxidant and estrogenic activity

Examples of lignan in a Sentence

Recent Examples on the Web

Key Takeaways Flaxseed's nutrients, such as dietary fiber, lignans, and omega-3 fatty acids, have been found to help manage blood lipid levels and lower high blood pressure. —Brittany Lubeck, Verywell Health, 27 Aug. 2025

Flaxseeds Flaxseeds contain high levels of lignans. —Lauren O'Connor, Health, 6 Aug. 2025

Tahini is high in antioxidants, especially lignans such as sesamin, which reduce the damage caused by free radicals in our bodies. —Alessandra Signorelli, Vogue, 31 May 2025

Flax contains properties such as alpha-linolenic acid (ALA) omega-3 fatty acids and lignans, which are responsible for anti-aging, reducing inflammation, preventing disease and protecting overall brain and heart health, according to DeCicco. —Angelica Stabile, FOXNews.com, 15 May 2025

Word History

Etymology

International Scientific Vocabulary lign- + -an entry 3

First Known Use

1944, in the meaning defined above

Rhymes for lignan

• chignon
• lignin
• mignon

Medical Definition

lignan

noun

lig·​nan ˈlig-ˌnan 

: any of a class of polyphenolic compounds including many found in plants and noted for having antioxidant and estrogenic activity

In the process of digestion, bacteria convert lignans into estrogen-like substances …

—Wellness Letter

The major types of phytoestrogens are thought to be isoflavones, found in soy protein, and lignans, found in flaxseeds, whole grains, and some fruits and vegetables.

—Consumer Reports