zo·na pel·lu·ci·da /ˌzonəpəˈlusədə, pɛlˈju-/
zona pel·lu·ci·da /-pəˈlusədə/ 名詞
(拉)透明帶
Zo·na n.; pl. Zonae A zone or band; a layer.
Zona pellucida.
Zona radiata
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zona pellucida
n : 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