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norethindrone

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WordReference Random House Unabridged Dictionary of American English © 2026

nor•eth•in•drone n. [Pharm.]

Drugsan orally active progestin, C₂₀H₂₆O₂, used as a progesterone, esp. as an oral contraceptive in combination with an estrogen.

by shortening and alteration of parts of its chemical name

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