blastoderm
Blas"to*derm, n. Etym: [Gr. sprout + E. derm.] (Biol.) Defn: The germinal membrane in an ovum, from which the embryo is developed.
Blas"to*derm, n. Etym: [Gr. sprout + E. derm.] (Biol.) Defn: The germinal membrane in an ovum, from which the embryo is developed.