Chromatoplasm is a term used in biology to refer to the pigmented substance within certain cells that imparts color. It is a synonym for chromatin, which is the material that comprises chromosomes in the nucleus. Other synonyms for chromatoplasm include chromoplast, which is the organelle responsible for pigment synthesis, and chromocyte, which is a cell that contains pigment. Additionally, chromatoplasm can be referred to as chromophore or chromule, which both denote the pigmented portion of a molecule. Finally, the term chromidia is another synonym for chromatoplasm and refers to the filamentous material seen in the nucleus during mitosis.