单词	ethinyl
释义	ethinyl noun ethi·​nyl e-ˈthī-nᵊl  ˈe-thə-ˌnil  variants or less commonly ethynyl : a monovalent unsaturated radical HC≡C− derived from acetylene by removal of one hydrogen atom Example Sentences Recent Examples on the Web One environmental estrogen is ethinyl estradiol—a chemical found in birth control pills. National Geographic, 3 Feb. 2016 Word History Etymology ethine ethyne + -yl First Known Use 1867, in the meaning defined above Phrases Containing ethinyl ethinyl estradiol ethinyl estradiol Medical Definition ethinyl noun ethi·​nyl variants also ethynyl e-ˈthīn-ᵊl, ˈeth-ə-ˌnil : a monovalent unsaturated radical HC≡C− derived from acetylene by removal of one hydrogen atom
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