/ Thesaurus / E Synonyms of embryonic membrane Find synonyms for: Noun1. caul, veil, embryonic membrane, fetal membraneusage: the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language