nucleolus defined in 1951 yearnucleolus - nucleolus;
nucleolus - Small dense body containing RNA and protein, one or more of which occurs inside the resting nucleus and is visible during life. Disappears during mitosis. Produced by certain regions of chromosomes (nucleolar organizers). Concerned in synthesis of ribosomes.
near nucleolus in Knolik
definition of word "nucleolus" was readed 1333 times