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norethisterone

nor·eth·is·ter·one [ nàwr e thístə rn ]


noun 
Definition:
 
oral progestogen: a progestogen drug. Use: oral contraceptives, hormone replacement therapy, treatment of premenstrual syndrome, menstrual disorders, endometriosis, cancer.

[<nor- + shortening and alteration of ethyne + -ster, INN stem]
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