Definition of vitelline in English:

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Pronunciation: /vɪˈtɛlʌɪn/
Pronunciation: /vʌɪˈtɛlʌɪn/ Pronunciation: /vɪˈtɛlɪn/


Zoology & Embryology
Relating to the yolk (or yolk sac) of an egg or embryo, or to yolk-producing organs: the vitelline arteries
More example sentences
  • At the second stage, when the sperm cell reaches the vitelline envelope, other recognition molecules allow bindin of the correct species to attach the sperm tightly to the egg.
  • From these observations and following experiments involving membrane removals, the authors concluded that the vitelline and embryonic membranes are essential to osmoregulation during development.
  • The ventral follicle cells produce proteins, like pipe, that are only deposited in the ventral vitelline envelope.


Late Middle English (in the sense 'coloured like egg yolk'): from medieval Latin vitellinus, from vitellus (see vitellus).

For editors and proofreaders

Line breaks: vi¦tel|line

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