Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun zona_pellucida

1 sense of zona pellucida

Sense 1
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)
       => zone, zona -- ((anatomy) any encircling or beltlike structure)