Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary

Search Dictionary:  

Meaning of ZONA

WordNet Dictionary
[n]  (anatomy) any encircling or beltlike structure

ZONA is a 4 letter word that starts with Z.


 Synonyms: zone
 See Also: anatomical structure, bodily structure, body structure, complex body part, structure, zona pellucida, zonula, zonule



Webster's 1913 Dictionary
\Zo"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.