'Blastema' definitions:

Definition of 'blastema'

(from WordNet)
noun
A mass of undifferentiated cells from which an organ or body part develops

Definition of 'Blastema'

From: GCIDE
  • Blastema \Blas*te"ma\, n.; pl. Blastemata. [Gr. bla`sthma bud, sprout.] (Biol.) The structureless, protoplasmic tissue of the embryo; the primitive basis of an organ yet unformed, from which it grows. [1913 Webster]