cra·​nio·​syn·​os·​to·​sis | \ ˌkrā-nē-ō-ˌsi-ˌnä-ˈstō-səs \

Definition of craniosynostosis

: premature fusion of the sutures of the skull

Examples of craniosynostosis in a Sentence

Recent Examples on the Web

Paul Davis' daughter was born with sagittal craniosynostosis. Bryan Lowry, kansascity, "Paul Davis says Congress should disclose names of members who settle harassment cases," 13 Dec. 2017 My grandson recently had surgery to correct craniosynostosis. Sainted & Tainted Writers, Twin Cities, "Sainted & Tainted: And along came Phil …," 25 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'craniosynostosis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of craniosynostosis

1951, in the meaning defined above

History and Etymology for craniosynostosis

New Latin

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The first known use of craniosynostosis was in 1951

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More Definitions for craniosynostosis


cra·​nio·​syn·​os·​to·​sis | \ -ˌsin-ˌäs-ˈtō-səs \
plural craniosynostoses\ -​ˌsēz \

Medical Definition of craniosynostosis

: the premature closure during infancy of the fibrous joints of the skull (such as the coronal suture or sagittal suture) Left untreated, craniosynostosis can lead to increased intracranial pressure, resulting in headaches, visual disturbances and developmental delay.The Chicago Daily Herald, 23 Nov. 2009

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