zona pellucida
ریشه و کاربرد
ریشه
Mid 19th century from Latin, literally 'transparent zone'.
مثال
- The zona pellucida is crucial for the fertilization process.
- The sperm must penetrate the zona pellucida to fertilize the egg.
- The zona pellucida is a protective barrier for the ovum.
ترکیبهای رایج
Penetrate the zona pellucida Zona pellucida of the ovum Zona pellucida in fertilization
تعریف انگلیسی
noun
- 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