nucleolus

nucleolus definition - medical

nu·cle·o·lus (no͞o-klēˈə-ləs)

noun pl. nu·cle·o·li (-līˌ)
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.

Related Forms:

  • nu·cleˈo·lar (-lər) adjective

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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