nucleolus /nu·cle·o·lus/ (noo-kle´o-lus) pl. nucle´oli [L.] a rounded refractile body in the nucleus of most cells, which is the site of synthesis of ribosomal RNA.
nucleolus
nucleolus [noo-kle´o-lus] (L.)
nu·cle·o·lus (n -kl   -ls)n. pl. nu·cle·o·li (-l   ) A small, typically round granular body composed of protein and RNA in the nucleus of a cell, usually associated with a specific chromosomal site and involved in ribosomal RNA synthesis and the formation of ribosomes. nu·cle o·lar (-lr) adj. |
nucleolus
[no̅o̅klē′ələs] pl. nucleoli
Etymology: L, little nut kernel
any one of the small, dense structures composed largely of ribonucleic acid that are situated within the cytoplasm of cells. Nucleoli are essential in the formation of ribosomes that synthesize cell proteins.
nucleolus [noo-kle´o-lus] (L.)
a rounded refractile body in the nucleus of most cells, which is the site of synthesis of ribosomal RNA, becoming enlarged during periods of synthesis and smaller during quiescent periods; multiple nucleoli occur in some cells.
nucleolus
pl. nucleoli [L.] a rounded refractile body in the nucleus of most cells, which is the site of synthesis of ribosomal RNA, becoming enlarged during periods of synthesis and smaller during quiescent periods; multiple nucleoli occur in some cells.
nucleolus organizer site
chromosomal sites for attachment of nucleoli.
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