A nucleus within a nucleus; spec. a small rounded body in a cell nucleus, involved in the synthesis and processing of ribosomal RNA and proteins…
= nucleolus, n.
A small body situated beside or resembling the nucleus of a cell; a nebenkern.
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。