embryonic disc

synonyms: blastodisc, germinal disc
https://doi.org/10.1351/goldbook.10609

Bilayer plate of cells in the blastocyst from which the mammalian embryo develops.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 744 [Terms] [Paper]