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English definition of “epithelium”

epithelium

noun [C or U]     /ˌep.ɪˈθiː.li.əm/ US  // (plural epithelia) specialized
a layer of cells covering all the surfaces of the body except the interior of blood and lymph vesselsSubstances and structures in the body
(Definition of epithelium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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