Definitions

1. adjective

relating to or derived from an allantois, especially in relation to the development of an embryo in certain species.

“The anallantoic membrane plays a crucial role in the embryonic development of amphibians.”

2. noun

an allantois in an embryo.

“The anallantoic sacs of the embryo began to break down and absorb nutrients from the environment.”

3. adjective

relating to the allantois, especially in relation to the development of an embryo.

“The anallantoic cavity formed at the end of the second week in human embryonic development.”