Title: hypoblast
Long Title: IUPAC Gold Book - hypoblast
DOI: 10.1351/goldbook.10829
Status: current

Definition
Innermost of the three primary germ layers, adjacent to the blastocyst cavity, that develops into the endoderm.

Related Terms
- blastocyst: https://goldbook.iupac.org//terms/view/10462
- endoderm: https://goldbook.iupac.org//terms/view/10659
- germ layers: https://goldbook.iupac.org//terms/view/10763

Source
- PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 766 (https://doi.org/10.1515/pac-2015-1202)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/10829/html
- json: https://goldbook.iupac.org/terms/view/10829/json
- xml: https://goldbook.iupac.org/terms/view/10829/xml

Citation: Citation: 'hypoblast' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.10829
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-13T15:41:27+00:00