Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
zona pellucida | Yes | No | No | No |
zona | Yes | No | No | No |
zona pellucida (noun) | zona (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 | (anatomy) any encircling or beltlike structure |