pellucid zone
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zone — A segment; any encircling or beltlike structure, either external or internal, longitudinal or transverse. SEE ALSO: area, band, region, space, spot. SYN: zona (1) [TA]. [L. zona] … Medical dictionary
zona — 1. SYN: zone. 2. SYN: herpes zoster. [L. fr. G. zone, a girdle, one of the zones of the sphere] z. arcuata SYN: arcuate zone. z. ciliaris SYN: ciliary zone. z. corona SYN: costal fringe. z. dermatica a rid … Medical dictionary
animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by … Universalium
zona pellucida — noun A glycoprotein membrane surrounding the plasma membrane of an oocyte Syn: pellucid zone … Wiktionary
Zona pellucida — The strong membrane that forms around an ovum as it develops in the ovary. The membrane remains in place during the egg’s travels through the fallopian tube. To fertilize the egg, a sperm must penetrate the thinning zona pellucida. If… … Medical dictionary
corona — SYN: crown. [L. garland, crown, fr. G. korone] c. capitis the topmost part of the head. SYN: crown of head. c. ciliaris [TA] the circular figure on the inner surface of the ciliary body, formed by the processes and folds (plicae) taken together.… … Medical dictionary
zo|na pel|lu|ci|da — «ZOH nuh peh LOO suh duh», Embryology. a thick, tough, transparent membrane surrounding the yolk of a developed mammalian ovum. ╂[< New Latin zona pellucida (literally) pellucid zone] … Useful english dictionary
degeneration — 1. Deterioration; passing from a higher to a lower level or type. 2. A worsening of mental, physical, or moral qualities. 3. A retrogressive pathologic change in cells or tissues, in consequence of which their functions are often impaired or… … Medical dictionary
Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H … Wikipedia
Sacramento, California — Sacramento redirects here. For other uses, see Sacramento (disambiguation). Sacramento City Aerial View of Downtown Sacramento … Wikipedia
