- the membrane surrounding the egg yolk.
Origin of vitelline membrane
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- zoology a membrane that surrounds a fertilized ovum and prevents the entry of other spermatozoa
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- The membrane enveloping the yolk of an egg.ovular membrane yolk membrane
- The pellucid zone of a mammalian ovum.yolk membrane
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.