- any of various thin membranes, as the peritoneum, that line certain cavities of the body and exude a serous fluid.
Origin of serous membrane
First recorded in 1865–70
Also called serosa.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of the smooth moist delicate membranes, such as the pleura or peritoneum, that line the closed cavities of the body and secrete a watery exudate
- A thin, two-part membrane that secretes a serous fluid and lines a closed body cavity, covering the organs that lie within that cavity.serosa serous tunic
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.