noun
tissue layer around small blood vessels
• Derivationally related forms: ↑perithelial
• Hypernyms: ↑membrane, ↑tissue layer
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—perithelial, adj.
/per'euh thee"lee euhm/, n., pl. perithelia /-lee euh/. Anat.
the connective tissue surrounding certain small vessels, as capillaries.
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perithelium, -thoracicsee peri- a, b.
Useful english dictionary. 2012.