Definitions

1. adjective

relating to or resembling the yolk of an egg

“The vitellary structure was crucial for the development of the chick embryo.”

2. noun

a yolk cell or a vitellus cell

“The vitellary cells played a key role in the fertilization process.”

3. noun

a yolk sac or a structure in which the yolk is enclosed

“The vitellary sac surrounded the developing embryo.”