vitelline
/vɪˈtɛlʌɪn
/ /vʌɪˈtɛlʌɪn/ /vɪˈtɛlɪn/adjective Zoology & Embryology
Relating to the yolk (or yolk sac) of an egg or embryo, or to yolk-producing organs: the vitelline arteries...
- 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.
Origin
Late Middle English (in the sense 'coloured like egg yolk'): from medieval Latin vitellinus, from vitellus (see vitellus).