zona pellucida   (TTS Sound)

The zona_pellucida has 1 Senses.

• zona pellucida
• 透明帯
• 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
• 哺乳類の卵の周りの厚い膜