<cell biology> The granule within the nucleolus or entoblast of a nucleated cell. ... Origin: Gr. 'entosthe from within. ... (30 Mar 1998) ... Found on http://www.encyclo.co.uk/local/20973
En·tos'tho·blast noun [ Greek 'e`ntosthe from within + -blast .] (Biol.) The granule within the nucleolus or entoblast of a nucleated cell. Agassiz. Found on http://www.encyclo.co.uk/webster/E/49