isoflavone

noun

iso·​fla·​vone ˌī-sō-ˈflā-ˌvōn 

: 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

Recent Examples on the Web

Some side effects of soy isoflavone include nausea, bloating, diarrhea, constipation, and fatigue.3 Discuss any new symptoms with your healthcare provider. 2. —Sohaib Imtiaz, Verywell Health, 17 Apr. 2025

Tofu is rich in isoflavones, which can help lower blood pressure and improve heart health. —Sheah Rarback, Miami Herald, 26 Mar. 2025

For reference, the average isoflavone intake among adults in Japan is around 30–50 milligrams a day (mg/day), whereas Americans generally eat less than 3 mg/day.17 Summary Tofu is a budget-friendly, nutrient-dense, and versatile source of protein. —Sohaib Imtiaz, Verywell Health, 24 Mar. 2025

May Prevent Prostate Cancer Some studies found isoflavones, compounds in soy, inhibit the growth and development of prostate cancer. —Larell Scardelli, Verywell Health, 5 Mar. 2025

Word History

First Known Use

1926, in the meaning defined above

Rhymes for isoflavone

• aldosterone
• anticyclone
• progesterone
• testosterone
• acetone
• anglophone
• baritone
• bourguignon
• buspirone
• chaperon
• chaperone
• cobblestone

Medical Definition

isoflavone

noun

iso·​fla·​vone -ˈflā-ˌvōn 

: 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)