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Pronunciation varies by accent · noun
(anatomy) A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels..
Use endothelium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Endothelium means (anatomy) A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use endothelium where its definition matches the intended context.
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