nucellus

from WordNet (r) 3.0 (2006)
nucellus
    n 1: central part of a plant ovule; contains the embryo sac
    
from The Collaborative International Dictionary of English v.0.48
Nucellus \Nu*cel"lus\, n.; pl. {Nucelli}. [NL., dim. of nux,
   nucis, a nut.] (Bot.)
   See {Nucleus}, 3
   (a) .
       [1913 Webster]
    

[email protected]