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	porphyrin
释义	porphyrin noun por·​phy·​rin ˈpȯr-fə-rən  : any of various compounds with a macrocyclic structure that consists essentially of four pyrrole rings joined by four =CH− groups especially : one (such as chlorophyll or hemoglobin) containing a central metal atom and usually exhibiting biological activity Example Sentences Recent Examples on the Web The researchers’ gold-scrubber is based on an organic compound called a porphyrin. Scott K. Johnson, Ars Technica, 28 June 2020 The compounds, called porphyrins, had previously been shown to be adept at absorbing light and using that energy to convert oxygen molecules in the air to a reactive form known as singlet oxygen. Robert F. Service, Science | AAAS, 3 Sep. 2019 Word History Etymology International Scientific Vocabulary, from Greek porphyra purple First Known Use 1910, in the meaning defined above Medical Definition porphyrin noun por·​phy·​rin ˈpȯr-fə-rən  : any of various compounds with a structure that consists essentially of four pyrrole rings joined by four =CH− groups especially : one (as chlorophyll or hemoglobin) containing a central metal atom and usually having biological activity
随便看	schnurkeramik scho schochet schoen Schoenberg schoenbergian schoenfeld's purple Schoenocaulon Schoenus schoepite Schofield Schoinobates schokker schola schola cantorum scholae scholae cantorum scholar scholarch scholarchs scholardom scholarian pigwidgeon pigwidgin pii

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。