/ Dictionary / Index S serous membrane: Meaning and Definition of Find definitions for: se'rous mem'brane Pronunciation: [key] — Anat., Zool. Anat.,Zool. any of various thin membranes, as the peritoneum, that line certain cavities of the body and exude a serous fluid. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. serous fluid Serov Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language