Definition of lignan
: any of a class of propyl phenolic dimers including many found in plants and noted for having antioxidant and estrogenic activity
Origin of lignan
International Scientific Vocabulary lign- + 3-an
First Known Use: 1944
Medical Definition of lignan
: 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, June 1999> <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, January 1999>
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Medical Dictionary: Definition of "lignan"
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