peri·the·li·um
| \ -ˈthē-lē-əm
\
\
plural perithelia\
-lē-ə
\
\
Medical Definition of perithelium
: a layer of connective tissue surrounding a small vessel (as a capillary)
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“Perithelium.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/perithelium. Accessed 23 May. 2022.
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