单词 | zona pellucida |
释义 | zona pellucida (once / 454589 pages) n WORD FAMILY zona pellucida USAGE EXAMPLESThese peptides make up what is called the "zona pellucida" — a sort of extracellular eggshell that surrounds the egg in a transparent layer. The Verge(Apr 27, 2016) His foot worked a pedal that lasered a hole in the coat of one of the eggs, the pretty zona pellucida. New York Times(Jun 27, 2014) The nonprofit he founded, the Science and Conservation Center, manufactures porcine zona pellucida vaccine. Slate(Apr 17, 2014) 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 Hyper zona, zone (anatomy) any encircling or beltlike structure |
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