het·ero·chro·ma·ti·za·tion \ˌhed.ərōˌkrōməd.ə̇ˈzāshən, -məˌtīˈz-\noun (-s) Etymology:heterochromat- (from heterochromatin) + -ization : the state of being or becoming heterochromatic : the transformation of genetically active euchromatin to inactive heterochromatin • het·ero·chromatized\| ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷məˌtīzd\adjective