zona pellucida

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Related to Zona pallucida: Granulosa cells, Theca interna

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.

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

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.

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.

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.

zona pellucida

a mucoprotein membrane that surrounds the egg of mammals. It is secreted by the ovarian follicle cells.