ヘテロクロマチンMeanings1nounheterochromatinA cytological term for densely packed, transcriptionally inactive chromatin; used in genetics and cell biology.ヘテロクロマチンは染せん色しょく体たいの構こう造ぞう維い持じに重じゅう要ようである。Heterochromatin is important for maintaining chromosome structure.