germ layer(n = noun.animal) - (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation;
is a kind of embryonic tissue
has particulars: ectoblast, ectoderm, exoderm, mesoblast, mesoderm, endoblast, endoderm, entoblast, entoderm, hypoblast

appleton layer, boundary layer, conjunctival layer of bulb, conjunctival layer of eyelids, e layer, f layer, germ, germ cell, germ plasm, germ pore, germ theory, germ tube, germ warfare, heaviside layer, horny layer, kennelly-heaviside layer, layer, layer cake, malpighian layer, ozone layer, pipe layer, tissue layer, wheat germ