/ Dictionary / Index N norethynodrel: Meaning and Definition of Find definitions for: nor•e•thy•no•drel Pronunciation: (nôr"u-thī'nu-drul, nô-reth'u-nu-drel"), [key] — n. Pharm. a progestin, CHO, used in combination with an estrogen in some oral contraceptives. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: norethynodrel (Thesaurus) norethindrone no-return Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language