Definitions

1. noun

a condition in which the bones of the skull fuse prematurely, often resulting in abnormalities of the cranial vault

“The infant was diagnosed with synostosis, which required immediate surgery to correct the deformity.”

2. noun

a type of abnormal bone growth where two or more bones fuse together abnormally

“The doctor explained to the patient that her synostosis was likely caused by a genetic mutation.”