Noun
A little nucleus.
A small rounded body contained in the nucleus of a cell or a protozoan.
Source: Webster's dictionaryA cell is a complex structure, with its investing membrane, nucleus, and nucleolus. Charles Darwin
During that year, a study of nucleoli by John Gurdon and Donald Brown in the African clawed frog Xenopus laevis generated increasing interest in the function and detailed structure of the nucleolus. Source: Internet
Nucleolus main An electron micrograph of a cell nucleus, showing the darkly stained nucleolus 3D rendering of nucleus with location of nucleolus The nucleolus is a discrete densely stained structure found in the nucleus. Source: Internet
Gene transcription ceases during prophase and does not resume until late anaphase to early G1 phase. citation citation citation The nucleolus also disappears during early prophase. citation Condensing chromosomes. Source: Internet
Half of the eggs had one nucleolus and 25% had two. Source: Internet
Other subnuclear bodies Besides the nucleolus, the nucleus contains a number of other non-membrane-delineated bodies. Source: Internet