Definition of microbeam
: a beam of radiation of small cross section a focused laser microbeam a microbeam of electrons
From the M-W Editors
1950
First Known Use of microbeam
1950
Medical Dictionary
microbeam
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noun
mi·cro·beam
\ˈmī-krō-ˌbēm\
Medical Definition of microbeam
: a beam of radiation of small cross section a laser microbeam
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