cranioclasis

noun
cra·​nio·​cla·​sis | \ ˌkrā-nē-ō-ˈklas-əs How to pronounce cranioclasis (audio) , -nē-ˈäk-lə-səs How to pronounce cranioclasis (audio) \
plural cranioclases\ -​ˈklas-​ˌēz, -​lə-​ˌsēz How to pronounce cranioclases (audio) \

Medical Definition of cranioclasis

: the crushing of the fetal head during a difficult delivery