Definition of Zona. Meaning of Zona. Synonyms of Zona
Here you will find one or more explanations in English for the word Zona.
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Definition of Zona
Zona Zona o"na, n.; pl. Zon[ae]. [L., a girdle. See Zone.]
A zone or band; a layer.
Zona pellucida. [NL.] (Biol.)
(a) The outer transparent layer, or envelope, of the ovum. It
is a more or less elastic membrane with radiating
stri[ae], and corresponds to the cell wall of an ordinary
cell. See Ovum, and Illust. of Microscope.
(b) The zona radiata.
Zona radiata [NL.] (Biol.), a radiately striated membrane
situated next the yolk of an ovum, or separated from it by
a very delicate membrane only.