marbleization

noun
mar·​ble·​iza·​tion | \ ˌmär-bə-lə-ˈzā-shən How to pronounce marbleization (audio) \

Medical Definition of marbleization

: the process of becoming or the condition of being veined or marked like marble examination revealed marbleization of both lower extremitiesJournal of the American Medical Association

called also marmoration