vitelline membrane


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Related to vitelline membrane: fertilization membrane, Corona radiata

vitelline membrane

n.
1. An extracellular coat that surrounds the egg in invertebrates and most nonmammalian vertebrates. Also called vitelline envelope.
2. The zona pellucida.

vitelline membrane

(vɪˈtɛlɪn; -aɪn)
n
(Zoology) zoology a membrane that surrounds a fertilized ovum and prevents the entry of other spermatozoa

vitel′line mem′brane


n.
the membrane surrounding an egg yolk.
[1835–45]
References in periodicals archive ?
enteritidis is not often deposited inside the nutrient-rich yolks of naturally contaminated eggs, penetration by the bacteria through the vitelline membrane into the yolk could result in a rapid increase in bacterial levels.
Another obvious change that can be observed during egg ageing is the flattening of the yolk caused by the weakening of the vitelline membrane [3].
The vitelline membrane of the hen's egg (VMHE) is transparent fibrous bilayer which encloses the yolk.
Degeneration of the vitelline membrane was evident at all treatment levels; severity was dose-related and greater in the outer vitelline membrane than the inner vitelline membrane.