Definition of idiochromatin in US English:

idiochromatin

noun

Genetics
disused
  • Chromatin which forms the chromosomes and is concerned with the reproduction of the cell; contrasted with trophochromatin.

Origin

Early 20th century; earliest use found in Science. From idio- + chromatin, perhaps after German idiochromatisch.

Pronunciation

idiochromatin

/ˌɪdɪə(ʊ)ˈkrəʊmətɪn/