DictionaryOr•tho-No•vumPronunciation: (ôr"thō-nō'vum), [key] Pharm., Trademark. a brand name for a tablet containing the progestogen norethindrone and an estrogen, used as an oral contraceptive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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