norethindrone

== English == === Etymology === From nor- +‎ ethyn(yl) +‎ (hy)dr(oxy) +‎ -one. === Pronunciation === (General American) IPA(key): /nɔɹˈɛθ.ɪnˌdɹoʊn/ === Noun === norethindrone (uncountable) (pharmacology) US form of norethisterone.