<cell biology> A nucleus isolated from a eukaryotic cell surrounded by a very thin layer of cytoplasm and a plasma membrane. The remainder of the cell is a cytoplast. ... (18 Nov 1997) ... 
A nucleus isolated from a eukaryotic cell surrounded by a very thin layer of cytoplasm and a plasma membrane. The remainder of the cell is a cytoplast.
Type: Term Pronunciation: kar′ē-ō-plast Definitions: 1. A cell nucleus surrounded by a narrow band of cytoplasm and a plasma membrane.