iso·fla·vone | \ ˌī-sō-ˈflā-ˌvōn \

Definition of isoflavone 

: a colorless, crystalline, bioactive ketone C15H10O2 also : any of various usually hydroxyl derivatives of isoflavone (such as genistein and daidzein) that are plant compounds possessing antioxidant and estrogenic activity in the body

Examples of isoflavone in a Sentence

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Likely, that’s because soy’s isoflavones help neutralize the BPA’s endocrine-disrupting effects, researchers say. Marygrace Taylor, Good Housekeeping, "Is Soy Good Or Bad For You? We Have The Science-Backed Answer.," 17 May 2017 Now Soy milk also contains phytonutrients known as isoflavones, which have been shown to have cancer-fighting properties. Amanda Macmillan, Time, "This Type of Non-Dairy Milk is the Healthiest, Study Says," 30 Jan. 2018 Yet evidence of isoflavones possibly having harmful effects appeared in the 1940s, spurring one of soy's first controversies. Jacqueline Howard, CNN, "Where do we stand on soy?," 27 Sep. 2017 Soybeans are high in fiber, as well as compounds called isoflavones, which include daidzein and genistein. Maggie Fox, NBC News, "Soy Might Be Good For Your Heart but It’s Not Definite, FDA Says," 30 Oct. 2017

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

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First Known Use of isoflavone

1926, in the meaning defined above

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The first known use of isoflavone was in 1926

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iso·fla·vone | \ -ˈflā-ˌvōn \

Medical Definition of isoflavone 

: a bioactive ketone C15H10O2 noted for its numerous derivatives that are found in plants (as the soybean) and have antioxidant and estrogenic activity also : any of these derivatives (as daidzein or genistein)

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