aromatase inhibitor

Aromatase inhibitors (AI) are a class of drugs used in the treatment of breast cancer and ovarian cancer in postmenopausal women that block the aromatase enzyme.
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Aromatase inhibitor n. A drug that inhibits tumor growth, especially breast cancer, by inhibiting the enzyme aromatase and thereby lowering estrogen [more]Aromatase inhibitor - Community and Resources

[a-ROW-ma-tays in-HIB-it-er]
A drug that prevents the formation of estradiol, a female hormone, by interfering with an aromatase enzyme. Aromatase inhibitors are used as a type of hormone therapy for postmenopausal women who have hormone-dependent breast cancer.