资料来源 : Webster's Revised Unabridged Dictionary (1913)

Nucleole \Nu"cle*ole\, n. [See {Nucleolus}.]
   The nucleus within a nucleus; nucleolus.

资料来源 : WordNet®

nucleole
     n : a small round body of protein in a cell nucleus; nucleoli
         contain RNA and are involved in protein synthesis [syn: {nucleolus}]