'Ectoblast' definitions:

Definition of 'ectoblast'

(from WordNet)
noun
The outer germ layer that develops into skin and nervous tissue [syn: ectoderm, exoderm, ectoblast]

Definition of 'Ectoblast'

From: GCIDE
  • Ectoblast \Ec"to*blast\, n. [Ecto- + Gr. ? bud, germ.] (Biol.) (a) The outer layer of the blastoderm; the epiblast; the ectoderm. (b) The outer envelope of a cell; the cell wall. --Agassiz. [1913 Webster]