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单词	ommatidium
释义	ommatidium noun om·​ma·​tid·​i·​um ˌä-mə-ˈti-dē-əm  plural ommatidia ˌä-mə-ˈti-dē-ə  : one of the elements corresponding to a small simple eye that make up the compound eye of an arthropod ommatidial ˌä-mə-ˈti-dē-əl  adjective Example Sentences Recent Examples on the Web In this kind of compound eye, each ommatidium has to be encased in something that blocks light in order to isolate it from the neighboring ommatidia, keeping each unit distinct. Scott K. Johnson, Ars Technica, 15 Aug. 2020 At the top of each ommatidium is a lens, with cone cells beneath it that also help focus incoming light. Scott K. Johnson, Ars Technica, 15 Aug. 2020 The tiny organ contains 100 ommatidia, or subunits that make up compound eyes found today in many insects, surrounding a light-sensing structure called a rhabdom. Jason Daley, Smithsonian, 11 Dec. 2017 Word History Etymology New Latin, from Greek ommat-, omma eye; akin to Greek ōps eye — more at eye First Known Use 1884, in the meaning defined above
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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。