首页  英汉  汉英  英英  词组  用法  例句  同义词  写作  俚语  缩写  词源  词根  法汉  德汉  日汉  俄汉  韩汉  西汉  意汉  泰汉  越汉

单词	pteridine
释义	pteridine noun pter·​i·​dine ˈter-ə-ˌdēn  : a yellow crystalline bicyclic base C6H4N4 broadly : any of a class of compounds (such as the pterins) that have the bicyclic ring system of pteridine and include especially various animal pigments Word History Etymology International Scientific Vocabulary pterin + -idine First Known Use 1943, in the meaning defined above Medical Definition pteridine noun pter·​i·​dine ˈter-ə-ˌdēn  : a yellow crystalline bicyclic base C6H4N4 that is a structural constituent especially of various animal pigments
随便看	orneriness ornerinesses ornery ornify ornis ornises ornith- ornithes ornithic ornithichnite ornithichnites ornithine ornithines Ornithischia ornithischiae ornithischian ornithischians ornithischias ornitho- Ornithocephalus ornithocopros ornithodelph Ornithodelphes ornithodelphia ornithodelphian

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。