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Webster 1913 Edition


Zona


Zo′na

,
Noun.
;
pl.
Zonae
.
[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 striae, 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.

Definition 2024


zoną

zoną

See also: zona, zóna, zonă, żona, žona, and żoną

Lithuanian

Noun

zoną f

  1. accusative singular form of zona.