[ fley-vuh-noid ]

  1. any of a group of water-soluble, principally yellow polyphenols present in plants and having a structure similar to flavone: flavonoids are noted for their antioxidant, antiviral, anticancer, anti-inflammatory, and antiallergenic properties.

Origin of flavonoid

First recorded in 1945–50; flavon(e) + -oid

Words Nearby flavonoid

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How to use flavonoid in a sentence

British Dictionary definitions for flavonoid


/ (ˈfleɪvəˌnɔɪd) /

  1. any of a group of organic compounds that occur as pigments in fruit and flowers

Origin of flavonoid

C20: from flavone + -oid

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for flavonoid


[ flāvə-noid′ ]

  1. Any of a large group of water-soluble plant pigments that are beneficial to health. Flavonoids are polyphenols and have antioxidant, anti-inflammatory, and antiviral properties. They also help to maintain the health of small blood vessels and connective tissue, and some are under study as possible treatments of cancer. Also called bioflavonoid

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.