Definition of serous membrane
: a thin membrane (as the peritoneum) with cells that secrete a serous fluid; especially : serosa
First Known Use of serous membrane
Medical Definition of serous membrane
: any of various thin membranes (as the peritoneum, pericardium, or pleurae) that consist of a single layer of thin flat mesothelial cells resting on a connective-tissue stroma, secrete a serous fluid, and usually line bodily cavities or enclose the organs contained in such cavities—compare mucous membrane
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