Definition of parachromatin in English:

parachromatin

noun

  • 1Cell Biology an achromatic substance of a nucleus (now rare).

  • 2Genetics (R. A. Brink's name for) the regulatory, as opposed to the structural, components of a chromosome.

Origin

Late 19th century; earliest use found in American Naturalist. From para- + chromatin, after German Parachromatin.