karyosome(redirected from chromatin nucleolus)
Also found in: Medical.
An irregular aggregation of chromatin in the nucleus of a cell not undergoing mitosis.
1. (Biology) any of the dense aggregates of chromatin in the nucleus of a cell
2. (Biology) the nucleus of a cell
kar•y•o•some(ˈkær i əˌsoʊm)
any of several masses of chromatin in the reticulum of a cell nucleus.