electron-dense
adjective
elec·tron-dense
i-ˈlek-ˌträn-ˈden(t)s 
: relatively impermeable to the electron beam of an electron microscope
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“Electron-dense.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/electron-dense. Accessed 14 Jun. 2025.
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