Title: otocephaly
Long Title: IUPAC Gold Book - otocephaly
DOI: 10.1351/goldbook.11054
Status: current

Definition
Congenital anomaly characterized by the absence or extreme underdevelopment of the lower jaw, producing closeness of the ears below the face.

Related Terms
- Congenital: https://goldbook.iupac.org/terms/view/10552
- agnathia: https://goldbook.iupac.org/terms/view/10352
- synotia: https://goldbook.iupac.org/terms/view/11279

Source
- PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 788 (https://doi.org/10.1515/pac-2015-1202)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/11054/html
- json: https://goldbook.iupac.org/terms/view/11054/json
- xml: https://goldbook.iupac.org/terms/view/11054/xml

Citation: Citation: 'otocephaly' 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.11054
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: 2026-06-10T05:21:13+00:00