: a method of amnion formation in certain mammals in which the embryonic knob invaginates into the yolk sac and no amniotic folds are formed — compare amnion
entypy — A type of gastrulation seen in some early mammalian embryos in which the endoderm covers the embryonic and amniotic ectoderm; part of the preplacental trophoblast may also be covered. [G. entype, pattern] * * * en·ty·py ent ə pē … Medical dictionary
