craniostenosis

noun
cra·​nio·​ste·​no·​sis | \ ˌkrā-nē-(ˌ)ō-stə-ˈnō-səs How to pronounce craniostenosis (audio) \
plural craniostenoses\ -​ˌsēz How to pronounce craniostenoses (audio) \

Medical Definition of craniostenosis

: malformation of the skull caused by premature closure of the cranial sutures