zona pellucida


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Related to zona pellucida: blastocyst, Granulosa cells

zona

 [zo´nah] (L.)
1. zone.
zona fascicula´ta the thick middle layer of the adrenal gland.
zona glomerulo´sa the outermost layer of the adrenal cortex.
zona ophthal´mica herpetic infection of the cornea.
zona pellu´cida
1. the transparent, noncellular, secreted layer surrounding an ovum.
Zona pellucida. From Applegate, 2000.
2. area pellucida.
zona radia´ta a zona pellucida exhibiting conspicuous radial striations.
zona reticula´ris the innermost layer of the adrenal cortex.
zona stria´ta a zona pellucida exhibiting conspicuous striations.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

zo·na pel·lu·ci·da

an extracellular coat, rich in glycoprotein, surrounding the oocyte; it contains microvilli of the oocyte and cellular processes of follicular cells and appears homogeneous and translucent under the light microscope.
Synonym(s): pellucid zone
Farlex Partner Medical Dictionary © Farlex 2012

zona pellucida

(zō′nə pə-lo͞o′sĭ-də, pĕl-yo͞o′-)
n.
A thick transparent extracellular coat that surrounds the mammalian ovum and is composed of glycoproteins. Spermatozoa bind to the zona pellucida during fertilization.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

zona pellucida

The glycoprotein-rich membrane surrounding the plasma membrane of an oocyte (egg), which binds spermatozoa and is required to initiate the acrosome reaction.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

zo·na pel·lu·ci·da

(zō'nă pel-lū'sid-ă)
An extracellular coat surrounding the oocyte; it consists of a layer of microvilli of the oocyte, cellular processes of follicular cells, and an intervening substance rich in glycoprotein; it appears homogeneous and translucent under the light microscope.
Synonym(s): pellucid zone.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

zona pellucida

a mucoprotein membrane that surrounds the egg of mammals. It is secreted by the ovarian follicle cells.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Wassarman, "Zona pellucida domain proteins," Annual Review of Biochemistry, vol.
Only a few sperm reach the zona pellucida. When a sperm binds, a reaction releases substances allowing the sperm to break through.
2008), and vitelline envelope proteins containing a zona pellucida domain, which are prominent components of egg coats of vertebrates (Swanson et al.
Biochemical and functional characterization of the human zona pellucida. Reprod BioMed Online 2003; 7 : 641-8.
As the oocyte grows it becomes enveloped by the zona pellucida, a translucent, jelly-like membrane consisting of mucopolysaccharides and proteins.
Localization of tyrosine phosphorylated proteins in human sperm and relation to capacitation and zona pellucida binding.
Characterization of equine zona pellucida glycoproteins by polyacrylamide gel electrophoresis and immunological techniques.
Partial zona dissection of human oocytes when failure of zona pellucida penetration is anticipated.