<procedure> A decompression operation in which the entire circumference of the calvarium is divided. ... Origin: G. Kranion, skull, + amphi, around, + tome, cutting ... (05 Mar 2000) ... 
Type: Term Pronunciation: krā′nē-am-fit′ō-mē Definitions: 1. A decompression operation in which the entire circumference of the calvarium is divided.