zona pellucida

(redirected from Zona pallucida)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Zona pallucida: Granulosa cells, Theca interna

zo·na pel·lu·ci·da

 (zō′nə pə-lo͞o′sĭ-də, pĕl-yo͞o′-)
A thick transparent extracellular coat that surrounds the mammalian ovum and is composed of glycoproteins. Spermatozoa bind to the zona pellucida during fertilization.

[New Latin zōna pellūcida : Latin zōna, belt, girdle + Latin pellūcida, feminine of pellūcidus, transparent.]

zo•na pel•lu•ci•da

(ˈzoʊ nə pəˈlu sɪ də, pɛlˈyu-)

n., pl. zo•nae pel•lu•ci•dae (ˈzoʊ ni pəˈlu sɪˌdi, pɛlˈyu-)
a transparent jellylike substance surrounding the ovum of mammals.
Also called zo′na.
[1835–45; < New Latin; see zone, pellucid]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.zona pellucida - thick membrane around the mammalian ovum; can be penetrated by one sperm in the fertilization process; usually remains around the fertilized egg until it is implanted in the wall of the uterus
zona, zone - (anatomy) any encircling or beltlike structure
zona pellucidazone pellucide