entosthoblast

from The Collaborative International Dictionary of English v.0.48
Entosthoblast \En*tos"tho*blast\, n. [Gr. 'e`ntosthe from within
   + -blast.] (Biol.)
   The granule within the nucleolus or entoblast of a nucleated
   cell. --Agassiz.
   [1913 Webster]
    

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