Thesaurus: nucleolus

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1. n. A little nucleus.
2. n. A small rounded body contained in the nucleus of a cell or a protozoan.
3. n. a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis
4. 1. A little nucleus. 2. (Biol.) A small rounded body contained in the nucleus of a cell or a protozoan. Note: It was termed by Agassiz the entoblast. In the protozoa, where it may be situated on one side of the nucleus, it is sometimes called the endoplastule, and is supposed to be concerned in the male part of the reproductive process. See Nucleus.
5. A small rounded body contained in the nucleus of a cell or aprotozoan.
6. n. a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis