zona pellucida

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Related to Zona pelucida: zona radiata

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 ?
(6), demostraron que oocitos bovinos libres de zona pelucida pueden ser utiles para la evaluacion in vitro de la capacitacion y la fertilizacion de espermatozoides equinos.
Sin embargo, la congelacion de embriones biopsiados no es tan sencilla ya que la zona pelucida ha sido perforada.
En el presente trabajo intentamos estudiar algunos aspectos moleculares que acontecen en el proceso de union de los espermatozoides humanos a la zona pelucida humana.