单词	microbeam
释义	microbeam noun mi·​cro·​beam ˈmī-krō-ˌbēm  : a beam of radiation of small cross section a focused laser microbeam a microbeam of electrons Example Sentences Recent Examples on the Web Gröblacher and his colleagues created microbeams of silicon, each 10 micrometers long and 1 by 0.25 micrometers in cross-section. Quanta Magazine, 25 June 2018 Word History First Known Use 1950, in the meaning defined above Medical Definition microbeam noun mi·​cro·​beam ˈmī-krō-ˌbēm  : a beam of radiation of small cross section a laser microbeam
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