n. [ Ecto- + Gr. &unr_; 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 ]
n. [ Ecto- + Gr. &unr_; 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 ]