NUCLEOLUS
nucleolus, nucleole
(noun) a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis
Source: WordNet® 3.1
Noun
nucleolus (plural nucleoli)
(cytology) A conspicuous, rounded body within the nucleus of a cell.
Source: Wiktionary
Nu*cle"o*lus, n.; pl. Nucleoli. Etym: [L., a little nut, dim. of
nucleus.]
1. A little nucleus.
2. (Biol.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition