| 单词 | vitelline membrane |
| 释义 | vitelline membrane in British Englishnoun zoology a membrane that surrounds a fertilized ovum and prevents the entry of other spermatozoa vitelline membrane in American Englishnoun the membrane surrounding the egg yolk Word origin [1835–45]This word is first recorded in the period 1835–45. Other words that entered Englishat around the same time include: basic, catch-up, communism, faceplate, squeegee |
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