from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A serous membrane, especially one that lines the pericardial, pleural, and peritoneal cavities, enclosing their contents.
  • n. The chorion of a bird or reptile embryo.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A membrane which lines an internal cavity to protect the contents and which secretes serum.

from The Century Dictionary and Cyclopedia

  • n. A serous membrane.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid


New Latin serōsa, feminine of serōsus, serous, from Latin serum, serum.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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